Magicshine Rear Bike Light SEEMEE 50/ SEEMEE 20 V2.0/SEEMEE 200 V3.0 Lightweight Tail Light for Night Ride,USB-C Rechargeable Bike Taillight,IPX6 Waterproof,Bicycle Tail Light for Road Urban Cyclists

One of a kind extremely bright 360 degree visibility secondary tracing light which points directly at the ground, creating an area light effect under the rider.
USB C Rechargeable Bike Lights , Quick charging via Type-C, fully charging within 1.5 hours. And the light can be up to 50 hours of battery life. quick press the power button to show remaining battery capacity. Press and hold the power switch for 5 seconds to turn on/off the brake sensor function. IPX6 waterproof, suitable under all weather conditions.
Smart Bike Taillight with Smart Brake Sensor and Ambient Light Sensor - With the brake sensor active, the bike light automatically detects a lane change or a sudden stop and increases brightness to 200 lumens for 3 second. ★★★NOTE: Runtime will be reduced significantly with brake sensor active.★★★
Group ride flash mode in this new version, which only emits 10 lumens and provides 50 hours of long runtime. In addition to this, we also redefine the smart mode. Now you can use the maximum output of 200 lumens during the daytime, which greatly improves the safety of daytime riding.
Multiple Mounting Options - Default mounts include a length adjustable silicone strap compatible with seat-posts of various sizes, a seat rail mount that hooks onto the two metallic rails under the seat, and 2x zipties for any DIY or helmet setup.