[Super Bright LED Bike Tail Lights] Our bike tail lights are equipped with 31 super bright LED lights, powerful flashing lights up to 160 lumens alert riders at night and day, improving your visibility and your safety. It includes slow flashing/breathing/fast flashing/constant light/emergency double flashing/taillight off modes, you can choose 6 lighting modes at will. [5 in 1 taillight intelligent] It is worth mentioning that this bike has five functions: warning lights / brake lights / turn signals / buzzer / anti-theft alarm. It can alert pedestrians and vehicles in all directions, and effectively protect the safety of car and driver. Have to say it is a practical bicycle accessory! [bicycle anti-theft alarm] bicycle anti-theft alarm can make loud sounds and vibrations, 110db volume can effectively scare away thieves and protect your bike. In the armed alarm state, the host will issue a 2-second warning if you touch or knock the bike; If you touch or knock again within 2-12 seconds, the host will issue a continuous alert for 30 seconds to stop the thief. 7 levels of sensitivity adjustable from touch to push or hit. [Rechargeable Wireless USB Remote Control] The bicycle tail light is built-in with 2200Mah large capacity rechargeable battery. When fully charged in 7 hours, the taillight alarm can work up to 70 hours. In addition, our wireless remote control bicycle taillights can be easily clipped onto 0.78-0.94 inch handlebars and come with a replaceable cr2032 button cell battery. What's more, the wireless range is up to 60 meters. [intelligent auto on/OFF] the bicycle alarm tail light has "slow flashing" or "breathing" intelligent auto mode. The bicycle taillight will automatically detect the brightness of the riding environment after 30 seconds. When you brake while riding, the bicycle light will immediately turn red for 2 seconds. [size] tail light: 125*33mm, Controller: 45*41*17mm