smart day/night function does not seem to work. How can I enable this mode?

I have found that light automatically switches between smart day or night. I own both the seemee 200 and 300 and I ride early morning before sunrise until after sunrise. When I select the brake mode by long pressing the power button until the light illuminates solid and then I select the mode I want; the light will automatically turn off the optitracing light after sunrise and be in day mode. The optitracing light only illuminates in night mode.

Can the mount fit my aero seatpost?

Yes sir. Also a seat mount is available if you have a bontrager seat or a new specialized. They have screw holes underneath for the special $10 mount

Will this attach to a road bicycle race Helmet? Pulsing effect looks great to help drivers accurately judge position of cyclist

The SEEMEE 300 is not designed to be attached directly to a road bicycle race helmet. It is primarily meant to be used on all standard saddles or seat posts.

Magicshine, I know you have an updated Allty 1500S coming out next month, is there any upgraded taillights (SeeMee) being released soon as well?

The SEEMEE 300 is now our newest taillight!

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Fully operational. Shipping worldwide, on schedule.Customs & duties included in the price

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SEEMEE 300 Bicycle Rear Light, 300 Lumens, 5 Night and Day Modes, Intelligent Brake Sensor, IPX6 Waterproof, USB-C Rechargeable for Night Riding

Product ID: 554763918

Details

Brand
MagicShine
Colour
Black
Material
Aluminum
Power source
Battery
Water resistance level
Waterproof

💡300 lumens max brightness

🔋USB-C rechargeable battery

🌧️IPX6 waterproof rating

Description

🚴‍♂️ Light up your ride, own the road!

VERSATILE 5 MODES - From smart daytime flash to low power mode, customize your light to match every ride and extend battery life.
SMART BRAKE SENSOR - Automatically signals braking with built-in motion sensor—boost your safety with zero effort.
ALL WEATHER DURABILITY - IPX6 waterproof aluminum housing stands strong through rain, fog, and grime—ride worry-free.
ADAPTIVE BRIGHTNESS TECH - Ambient light sensor adjusts brightness to surroundings—perfect visibility day or night.
BRILLIANT 300 LUMENS VISIBILITY - Dual LEDs with optimized lens angles for superior 260° rear visibility—never blend into the night.

The SEEMEE 300 is a high-performance rear bike light delivering 300 lumens of brightness with 260° visibility. Featuring a smart brake sensor, ambient light adjustment, and five versatile modes, it ensures maximum safety in all conditions. Its IPX6 waterproof aluminum design and USB-C rechargeable battery make it a durable, eco-friendly choice for serious cyclists.

Specifications

ASIN	B0C58TNZDD
Auto Part Position	Rear
Best Sellers Rank	#46,314 in Sporting Goods ( See Top 100 in Sporting Goods ) #96 in Bike Taillights
Brand Name	MagicShine
Color	Black
Customer Reviews	4.4 4.4 out of 5 stars (738)
Included Components	SEEMEE 300 Rear Light
International Protection Rating	IPX6
Item Dimensions L x W x H	35L x 32W x 64H millimeters
Item Type Name	300 Lumens Smart Bicycle Rear Lights
Item Weight	0.12 Kilograms
Light Output Maximum	300 Lumens
Manufacturer	Magicshine
Manufacturer Part Number	SEEMEE 300
Material Type	Aluminum
Model Number	SEEMEE 300
Mounting Type	Seat Mount
Number of Items	1
Number of Packs	1
Number of settings	5
Power Source	Battery Powered
Unit Count	1.0 Count
Water Resistance Level	Waterproof

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