[2 In 1 Bike Alarm Tail Light]Multi-function anti-theft alarm tail light designed with bike alarm, COB , and 200-degree wide-angle design, the led bike light will make you more visible for other road users in dark night or daytime. Keeping you safe at all times. [Smart Brake Sensing Technology]Designed with the brake sensor, Automatic ultra-bright brake light will automatically after . The bicycle light is super bright and highly visible from a distance, really catch attention to enhance your safety. [Extremely Loud 115dB]The bike security alarm can make a loud sound to draw people's attention. 115dB Loud can effectively scare thieves , can also be used as a bright taillight, intelligent remote alarm, and bike horn. Two mounting methods for all types of bicycles [IPX5 Waterproof& USB Rechargeable]IPX5 grade waterproof bike tail light against splashing water from any angle. Built-in 700mAh Polymer Lithium battery comes with a USB cord that charges from your computer, wall charger, power bank, or any other device with a USB port. After charging for 3 hours, the tail light can work for 20-40 hours in 3 different modes. (Slow flash-40h, Breathing flash-30h, Steady on-20h) [Easy Mount and Removable]Saddle mounting bracket and adjustable silicone strap provided, make the bicycle rear light flexible to quick install or detach on bicycles, post, tube bracket. Very convenient to unscrews from the mounting cap for recharging. Product model: A8PRO Taillight alarm : LED COB Red Light Light Mode: 4 modes (Auto Fast Strobe & Breathing, Manual Pop-Strobe& Steady) Alarm: 115db, A8Pro has 5 tones and volume adjustable, A8 has 1 tone, not adjustable A8Pro Battery: 800mAH, runtime . 8-30Hrs. (A8 Battery: 700mAH) Controller Battery: 12V/27A battery, replaceable, not chargeable Ingress protection: IP65, water splash proof. Do not submerge in water to use Mount: saddle rail or round post, both brackets included Controller: . 23 Gramssaddle installation If there are slight differences in some parts, it will not affect the use of the product Colour:black Material:PC+ABS Package Contents: 1 x Bike Alarm Taillight 1 x Mount Holder 1 x post mount 1 x Remote Control 1 x Usb Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.