1、Multifunctional: Used as a bicycle tail light and brake light; with antitheft alarm function, it can scare off thieves and protect the bike. 2、Bell Button: The taillight is equipped with a remote control. Press the bell button on the remote control to remind surrounding pedestrians and vehicles to avoid it. 3、6 Warning Mode: Press the remote control light key to switch the tail light mode, red light: slow flash, breathing, burst flash, always on; yellow light: emergency double flash; yellow light: tail light off (animation effect). 4、High Sensitivity: Through the dual mode of light sense and vibration, it can recognize whether the bicycle is in use, and the lights will automatically flash when riding at night, no need to switch. 5、Smart Mode: Automatic slow flashing or breathing mode, the taillights will automatically detect the brightness of the riding environment after 30 seconds of lighting, and automatically light up when it is dark. 6、Durable Construction: The bike brake light alarm is made of PC material, which is waterproof, dustproof, resistant to high and low temperature, and can be used for a long time on the bicycle. 1 x Alarm Tail Light1 x Remote Control1 x Bracket2 x Buckle1 x Rubber Pad3 x Screw3 x Nut1 x Hex Wrench1 x Rope1 x Hook1 x Usb Cable1 x Manual Item Type: Bike Alarm Tail LightMaterial: PCAlarm Battery: 1 x 18650 3.7V 2000mAh lithium battery(built inStandby Time: 4-8 monthsCharging Interface: Standard USB 5VRemote Control Battery: 1 x CR2032 button battery 250mAh (built in)Standby Time: 3-5 years (30 times a day)Operating Frequency: 433.92MHzWireless Range: Approx. 30-60m/ 98.43- 196.85ftWorking Environment Temperature: -40-+60℃Working Environment Humidity: <80%Storage Temperature: -40 - +70℃