Super bright LED tail light]. Our bike taillight features 31 ultra-bright LEDs with up to 160 lumens of powerful flashing light to alert riders night and day, improving your visibility and safety. It includes slow flash/breathing/quick flash/constant light/emergency double flash/back light off modes, you can choose as many light modes as you like from the 6 light modes. > 5-in-1 Smart Rear LightIt should be mentioned that this bike has five functions: warning light / brake light / flashing light / electric bell / anti-theft alarm. It can alert pedestrians and vehicles in all directions, effectively protecting the safety of cars and drivers. Needless to say, this is a practical bicycle accessory! Bicycle Anti-theft AlarmThe bicycle anti-theft alarm can emit loud sound and vibration, 110dB volume can effectively scare away thieves and protect your bicycle. In alarm status, if you touch or bump the bike, the main unit will issue a 2-second warning; if you touch or knock again within 2-12 seconds, the main unit will alarm continuously for 30 seconds to stop the thief. 7 adjustable sensitivity levels, from touch to push or shock. [Rechargeable & Wireless USB Remote Control. The bicycle taillight is equipped with a 2000mAh high capacity rechargeable battery. When fully charged in 7 hours, the taillight alarm can work for 70 hours. Also, our wireless remote control bike taillight easily mounts to 0.78-0.94 inch handlebars and comes with a replaceable CR2032 button cell battery. In addition, the range of the wireless remote control is up to 60 meters. Smart Auto Start/Stop]. The rear light of the bicycle alarm has an intelligent automatic "slow flash" or "breathing" mode. The bicycle tail light automatically detects the brightness of the riding environment after 30 seconds. When you brake in the middle of a ride, the rear light of the bike will immediately turn red for 2 seconds.