--- product_id: 98197740 title: "Wireless Door Bell, CW-21 Mini Waterproof Wireless Doorbell Operating at Over 1000 Feet, 2 Remote Buttons Can Have Different Tones, 52 Melodies, CD Quality Sound and LED Flash" price: "R783" currency: ZAR in_stock: true reviews_count: 13 url: https://www.desertcart.co.za/products/98197740-wireless-door-bell-cw-21-mini-waterproof-wireless-doorbell-operating store_origin: ZA region: South Africa --- # IP55 waterproof rating 1000 ft wireless range 115 dB max volume Wireless Door Bell, CW-21 Mini Waterproof Wireless Doorbell Operating at Over 1000 Feet, 2 Remote Buttons Can Have Different Tones, 52 Melodies, CD Quality Sound and LED Flash **Price:** R783 **Availability:** ✅ In Stock ## Summary > 🔔 Elevate your entryway game with sound, style, and unstoppable range! ## Quick Answers - **What is this?** Wireless Door Bell, CW-21 Mini Waterproof Wireless Doorbell Operating at Over 1000 Feet, 2 Remote Buttons Can Have Different Tones, 52 Melodies, CD Quality Sound and LED Flash - **How much does it cost?** R783 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/98197740-wireless-door-bell-cw-21-mini-waterproof-wireless-doorbell-operating) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Smart Memory Function:** Automatically remembers your last melody and volume settings after power outages—set it once, enjoy hassle-free use forever. - • **Weatherproof Durability:** Built to withstand rain, dust, and extreme temperatures from -4°F to 140°F—reliable performance in any climate. - • **Customizable Sound Experience:** Choose from 52 unique melodies and 5 volume levels, including a silent mode perfect for undisturbed naps or late nights. - • **Seamless Long-Range Connectivity:** Stay connected up to 1000 feet away—never miss a visitor, no matter where you are in your home or office. - • **Effortless Installation & Expansion:** No wiring needed—mount transmitters with included screws or adhesive pads, and easily add more receivers for full coverage. ## Overview The AVANTEK CW-21 Wireless Doorbell offers a robust 1000-foot wireless range with zero interference, 52 customizable melodies, and a powerful 115 dB speaker. Its IP55 waterproof and dustproof design ensures reliable operation in harsh weather, while ultra-low power consumption lithium batteries provide up to 3 years of use. Easy to install with no wiring required, it supports multiple transmitters with distinct tones and remembers your settings after power outages, making it the ultimate smart doorbell solution for modern homes and offices. ## Description AVANTEK Wireless Door Bell, CW-21 Mini Waterproof Wireless Doorbell Operating at Over 1000 Feet, 2 Remote Buttons Can Have Different Tones, 52 Melodies, CD Quality Sound and LED Flash - desertcart.com Review: No wires! - Great product. Easy to install and very versatile. Variable ringtones let you differentiate between front and back doors. No wires! Review: Worked immediately out of the box when protective cover on battery was removed - I used this to replace an older wireless doorbell. Main reasons for replacing the older unit were that it was not really loud enough, and had only one chime unit. The new one I ordered came with two chime units. I plugged in one of the chime units high on a balconyl above some picture frames, and followed the instructions to enable the battery on the doorbell button. When I pressed the button, I immediately heard the traditional "ding-dong" sound from the chime at a perfect volume level. I may experiment with other sounds, but this is the one I am used to. Later I moved this receiver to a Bluetti EP500 in the kitchen which keeps my refrigerator running during power outages (in the picture, the chime is hidden behind an orange extension cord). I then plugged in the second chime in the basement, where it is hard to hear the first one. It also responded to the doorbell without needing any further adjustment. The only slight inconvenience was that button did not have pre-drilled holes for mounting, and I preferred to mount it with screws. But that was easily solved with an electric drill. Although that could be a drawback, I don't consider it serious enough to affect the overall rating since an adhesive mounting is also provided. To enable the doorbell to work during a power outage, I plugged one of the receivers into a Bluetti EP500 which also powers my refrigerator. In the picture, it is partly hidden behind an orange extension cord. ## Features - EASY TO SET UP: 2 transmitters included; can add more AVANTEK RB-1/CR-1 plug-in receivers for increased coverage; simply fix the transmitter on the wall without any wiring; includes 4 screws, 4 anchors, 1 key and 2 double-sided adhesive pads - 1,000 FT/300 M ULTRA LONG WIRELESS RANGE: Will not interfere with other equipment in your home or those of your neighbors; ensures you will never miss a visitor, even if you are a few rooms away or on another floor - TAILOR YOUR TRANSMITTER: 1.1 in (29 mm) stereo speaker delivers rich and crisp sound; 52 melodies and 5 adjustable volume levels with a maximum setting of 115 dB; set a different ring tone for each transmitter so that you know exactly which doorbell has been rung - HIGH PERFORMANCE: The transmitter has ultra-low power consumption; uses a lithium battery that boasts 3-year maximum lifespan; IP55 dustproof and waterproof rating; works between -4 °F to 140 °F, withstands various harsh weather conditions - MEMORY FUNCTION: Remembers your last melody and volume level after a power outage; no need to reset to your previous settings; convenient and easy-to-use design for an enhanced user experience ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B07KC1SX1F | | Batteries | 2 CR2 batteries required. | | Batteries Included | No | | Batteries Required | Yes | | Battery Cell Type | Lithium Manganese Dioxide | | Best Sellers Rank | #20,976 in Tools & Home Improvement (See Top 100 in Tools & Home Improvement) #10 in Door Bell Push Buttons | | Color | 2 Transmitters White | | Customer Reviews | 4.7 4.7 out of 5 stars (9,532) 4.7 out of 5 stars | | Date First Available | January 30, 2019 | | Included Components | 1 × Plug-in receiver, 1 × User manual, 2 × Adhesive tape, 1 × Screwdriver, 4 × Screw, 4 × Anchor, 2 × Transmitter | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 6.7 ounces | | Manufacturer | AVANTEK | | Part Number | CW-21 | | Product Dimensions | 2.8 x 0.6 x 3.1 inches | | Sound Level | 115 Decibels | | Voltage | 3 Volts | ## Images ![Wireless Door Bell, CW-21 Mini Waterproof Wireless Doorbell Operating at Over 1000 Feet, 2 Remote Buttons Can Have Different Tones, 52 Melodies, CD Quality Sound and LED Flash - Image 1](https://m.media-amazon.com/images/I/51DuHYGxu2L.jpg) ## Available Options This product comes in different **Color** options. ## Questions & Answers **Q: I want to use this in my classroom to signal different things. Can you program each remote to different tones from each other?** A: Yes each remote can have different sounds **Q: Is there a doorbell or device that can change the sounds from the remote itself??** A: I'm not sure I understand your question. There are two (well three actually) parts to this doorbell (2 bells that go outside your home, one on the front door and one on the back door if you want to use both. You don't have to use both if you don't want to....and then there's the remote that gets plugged into an outlet inside your home. The remote has about 50 different sounds (rings, noises and tunes) which you can program on the remote (more choices than I will ever need). If you do use both doorbells they can each be programmed for a different sound or tune so that if one is on your front door and one on your back door, you'll know by the sound which door your caller is at. I only use one doorbell. It was pretty easy to set up once I removed the plastic tab that covered the battery (they don't mention that in the instructions). I spent allot of time trying to program it but it won't work until that plastic tab is removed that covers the battery. All in all I am pleased with this purchase and it works nicely....loud and clear. **Q: I need 2 simple tones,1 for each door. Are these tones in the beginning of choices or scattered throughout the list i would hate scaning through all ?** A: If I remember correctly (and sometimes I don't), the tones are into group types. First was the simple everyday tones, then noises (like a dog barking) and then melodies I'm not sure of the order they are in. I did listen to all of them because it was fun and I wanted to hear them all so I could select the two I liked best. I did select 2 different melodies so I could tell by the melody if someone was at the front door or the back door. **Q: Can the receiver be put behind a chest?** A: yes, as long as you can plug it in to an outlet close enough to the house entrance it should work ## Customer Reviews ### ⭐⭐⭐⭐⭐ No wires! *by J***. on May 28, 2026* Great product. Easy to install and very versatile. Variable ringtones let you differentiate between front and back doors. No wires! ### ⭐⭐⭐⭐⭐ Worked immediately out of the box when protective cover on battery was removed *by E***S on September 6, 2024* I used this to replace an older wireless doorbell. Main reasons for replacing the older unit were that it was not really loud enough, and had only one chime unit. The new one I ordered came with two chime units. I plugged in one of the chime units high on a balconyl above some picture frames, and followed the instructions to enable the battery on the doorbell button. When I pressed the button, I immediately heard the traditional "ding-dong" sound from the chime at a perfect volume level. I may experiment with other sounds, but this is the one I am used to. Later I moved this receiver to a Bluetti EP500 in the kitchen which keeps my refrigerator running during power outages (in the picture, the chime is hidden behind an orange extension cord). I then plugged in the second chime in the basement, where it is hard to hear the first one. It also responded to the doorbell without needing any further adjustment. The only slight inconvenience was that button did not have pre-drilled holes for mounting, and I preferred to mount it with screws. But that was easily solved with an electric drill. Although that could be a drawback, I don't consider it serious enough to affect the overall rating since an adhesive mounting is also provided. To enable the doorbell to work during a power outage, I plugged one of the receivers into a Bluetti EP500 which also powers my refrigerator. In the picture, it is partly hidden behind an orange extension cord. ### ⭐⭐⭐⭐⭐ The Best Doorbell *by J***N on February 1, 2019* I did a lot of research before selecting this doorbell. It is very easy to install and the 2 ringers are exactly what I needed to replace an old 13 year old doorbell. My problem was that my house is one story, but 80 feet long. When I am in the back office I usually cannot hear the front doorbell. So I placed one near the front of the house where my bedroom is, and one in the middle that covers the back of the house. About 50 feet into my house, with the signal only having to go through one drywall. I finally settled on level 3 of the 1 - 5 level ringers. Level 3 is loud enough. This doorbell solved the 2 most frequent criticisms mentioned in many of the reviews of various doorbells that I read. [1] The size of the "mini" ringers has been reduced so that when you plug it into a 2 socket plug it doesn't also cover the 2nd plug. And [2] The sound level and ring tone one chooses stays set if the power goes out or if you move the ringer to another location. That is, you don't have to go through from scratch the 50+ bell tones to reset it to the one you want if the power goes out. This also makes it easy to program these ringers. I plugged them into a plug over my kitchen shelf to choose the sound level and ring tone from a comfortable standing position, and then unplugged it and plugged it into a plug near the floor where I wanted it. The settings stayed set. Using the two-sided sticky tape was more than strong enough to install the push button outside next to my door. The screws are unnecessary. The only complaint I have is when you open up the doorbell push button to pull out the plastic separation tab to enable the battery to make contact to enable the doorbell to work. The battery cover was very tight and it was difficult to pull out the plastic tab. I hope in a couple of years when I change the battery that I can get the battery cover easily removed. A little less tightness would be an important improvement. I could also live happily with only 4 or 5 choices of ring tones instead of the 50+ that I can't imagine anyone choosing. Overall, I think they have solved the most common complaints of other doorbells, and this is now the best doorbell out there. ## Frequently Bought Together - AVANTEK Wireless Door Bell, CW-21 Mini Waterproof Wireless Doorbell Operating at Over 1000 Feet, 2 Remote Buttons Can Have Different Tones, 52 Melodies, CD Quality Sound and LED Flash - Energizer CR2032 Batteries for Watches, AirTags, Key Fobs, Small Electronics 4 Count (Pack of 2), CR2032 Battery --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.za/products/98197740-wireless-door-bell-cw-21-mini-waterproof-wireless-doorbell-operating](https://www.desertcart.co.za/products/98197740-wireless-door-bell-cw-21-mini-waterproof-wireless-doorbell-operating) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-07-04*