1. Bike Tail Light with Alarm and RemoteCompared to the other taillights, we added a remote control. 4-in-1,remote,Tail light, brake light, anti-theft alarm, bike bell. 4 light modes, COB high lumen light to meet the requirements of night riding. Adopt 3D displacement sensor and special algorithm. Identify theft more accurately and reduce false alarms effectively. Wireless range is about 98-196 Ft. Easily search your vehicle by pressing the bell button on the remote control. 2. Smart Brake Light and Auto On or OffOnce you brake or slow down, the brake light will immediately and automatically go on high for 2s to alert others. In smart mode (slow flash or breathing), the lights will automatically turn on or off according to the environment. In the dark, if you stop for more than 30 seconds, it will turn off automatically to save power if you ride again, it will light up automatically. Using a smart bike tail light alarm can improve the of cyclists on the road. 3. USB Rechargeable and IP65 Built-in 4.2V 700mAh rechargeable bike tail light battery with Type-C port, lasts 1 to 3 months on daily use.The remote control uses a 27A (12V) replaceable battery and lasts 1-2 years with 5 uses per day.Bicycle tail light is made of PCand UV resistant material with IP65 rating, which can effectively protect from rain, sun and snow. Easy to install with the included bracket, double-sided tape, and strap. 4. Anti-theft Bicycle AlarmBike tail light alarm system, including vibration function and loud alarm. The bike taillight can be triggered by vibration and emit a loud alarm up to 113dB, which can effectively deter bike thieves and draw attention to theft attempts.The disalarm button of the remote control allows you to easily deactivate the alarm with just one press. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.