why does temperature readout default to celcious from fahrt after turning back on

Since the multimeter doesn’t have a power-down memory function, when it is turned off, the temperature mode will return to default mode Celsius. I am afraid you have to reset the temperature to Fahrenheit each time you restart it. Sorry for any inconvenience.

Are batteries replaceable?

Under normal circumstances, it can be used for 4 to 5 hours after charging. Users can use it while charging. The built-in rechargeable battery does not need to be replaced.

what do you need to do to keep the temp setting in fahrt and not default to celcious upon restarting?

Since the multimeter doesn’t have a power-down memory function, when it is turned off, the temperature mode will return to default mode Celsius. I am afraid you have to reset the temperature to Fahrenheit each time you restart it. Sorry for any inconvenience.

The ones supplied with my dvm are loose and making poor, intermittent contact, where can i get replacement probes?

Thank you very much for your feedback. Regarding the looseness of the probe, can you take a short video to give us feedback on the specific looseness? I shot a video and uploaded it, can you tell me that the part of the red circle is loose? Because this is a special probe, it cannot be purchased outside. If it is confirmed that it is the problem of the probe, we will send you a replacement probe from China for free, I wish you a happy life。

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- ZOYI Bluetooth Speaker Multimeter with Voice Broadcast, Time and Alarm, Auto-ranging Multimeter(19999) with True RMS, AC/DC V/A, Capacitance, Resistance, Diodes, Continuity, Frequency, Temperature

Product ID: 451847400

Details

Brand
ZOTEK
Color
black
Item Weight
1.9 pounds
Power Source
Battery
Style
Digital

⚡4½-digit True RMS, 19999 counts

📱Remote app control via Bluetooth

🔊360° surround Bluetooth speaker

R3742

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

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Description

🎧⚡ The only multimeter that tests circuits and sets the vibe—because precision should sound this good.

PRECISION MEETS POWER - Lab-grade 4½ digit multimeter with True RMS and 19999 counts for ultra-accurate AC/DC voltage, current, and more.
DUAL SCREEN CONVENIENCE - Large backlit main display plus secondary screen for time, temperature, and battery status—visibility optimized for any environment.
SEAMLESS BLUETOOTH INTEGRATION - Dual speakers deliver immersive 360° sound while your phone doubles as a remote multimeter controller via dedicated app.
MULTIFUNCTIONAL LIFESTYLE DEVICE - From professional electronics diagnostics to bedroom alarm clock and party speaker—one device, endless possibilities.
VOICE BROADCAST FOR HANDS FREE TESTING - Real-time voice data announcements keep you focused on your work without looking away from circuits.

The ZOYI Bluetooth Speaker Multimeter is a cutting-edge 4½-digit True RMS auto-ranging multimeter with 19999 counts, combining professional-grade electrical testing capabilities with immersive 360° Bluetooth audio. Featuring real-time voice broadcast, dual-screen displays, and remote app control, it’s designed for electricians, DIYers, and tech-savvy professionals who demand precision and multifunctionality in one sleek device.

Specifications

ASIN	B0B2181BTQ
Best Sellers Rank	#758,777 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #1,199 in Multi Testers
Brand Name	ZOTEK
Color	black
Compatible Devices	Electrical devices and circuits
Customer Reviews	4.2 4.2 out of 5 stars (54)
Included Components	1
Item Dimensions	9 x 5.9 x 6.1 inches
Item Weight	1.9 pounds
Manufacturer	ZOYI
Measurement Type	Multimeter
Model	zt-5566se
Number of Items	1
Part Number	zt-5566se
Power Source	Battery Powered
Style Name	Digital
UPC	735550616523
Unit Count	1 Count

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R3742

Duties & taxes included

In stock

Sold byAmazon South AfricaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to South Africa.

Secure transaction

Trustpilot

TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

2 weeks ago

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Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

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