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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🚴‍♂️ Light up your ride, own the night!

ALL WEATHER DURABILITY - IPX6 waterproof aluminum housing means your light stays flawless through rain or shine.
BRILLIANT 300 LUMEN OUTPUT - Illuminate your path with unmatched brightness and 3000m visibility—never blend into the night again.
260 WIDE ANGLE VISIBILITY - Stay visible from every angle with superior coverage that keeps you confidently seen in traffic.
SMART BRAKE AMBIENT SENSORS - Automatically adapts brightness and signals braking for ultimate safety and hands-free control.
ULTRA LONG RUNTIME FAST USB C CHARGING - Get up to 200 hours in eco mode and a full charge in just 2 hours—ready whenever you are.

The MagicShine SEEMEE 300 is a high-performance rear bike taillight featuring 300 lumens brightness, smart brake and ambient light sensors, and 5 versatile modes for day and night riding. Its IPX6 waterproof aluminum body ensures durability in all weather, while a powerful 1600mAh battery offers up to 200 hours runtime in eco mode with quick USB-C charging. Designed for maximum visibility with 260° coverage and a 3000-meter visibility range, it’s the perfect safety upgrade for serious cyclists.

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€ 135.85

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Color	Black
Height	6.4 centimeters
Length	35 millimeters
Width	32 millimeters
Material Type	Aluminum
Number of Items	1
Power Source	Battery Powered
Included Components	SEEMEE 300 Taillight
Batteries Included?	Yes
Brand	MagicShine
Department	unisex-adult
Manufacturer	Magicshine
Item model number	SEEMEE 300
Product Dimensions	3.2 x 3.5 x 6.4 cm; 120 g
ASIN	B0C58TNZDD

Magicshine SEEMEE 300 Bike Taillight,300 Lumen Bike Tail Light,5 Night & Daytime Modes,Smart Brake Sensor IPX6 Waterproof USB-C Rechargeable Rear Bike Light for Night Riding

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