[SMART BRAKE SENSING & WORKING MODES] - Automatically switch to bright light mode when braking, super bright 5 seconds light to warn the rider, improve your safety.There are 4 light modes for your choice,Flash1, Flash2, Breath, Constant on . Please enjoy your cycling as you wish.
[LONG LASTING BATTERY LIFE & FRESNEL OPTICAL LENS DESIGN] - The USB rechargeable bike rear light Built-in 400mAh Li-ion battery, it can lasting up to 37 hours running time when 2 hours charging.Fresnel optical lens design, small size, high brightness is 1.5 times the brightness of the same LED light.
[EASY TO INSTALL] - It is so easy to install and no tools required that you can Mount it under the saddle with metal mounting bracket or mount to the seat post with adjustable silicone strap.
[WATERPROOF IPX6] - this brake sensing rear lights can prevent rainwater infiltration in a short time and be used in light rain. Please note: do not use in the rain for a long time.
[STRONG & DURABLE SHELL ] - Made of aluminum alloy shell, this bike rear light has a nice touch and awesome appearance. It's waterproof, dust-proof and shockproof, suitable for any harsh working environment.