Taillight/Brake light/Anti-theft alarm/Bike bell 3-in-1 function! Reminding the surrounding pedestrians and drivers with light and sound warning, effectively protect the safety of the car and the ! Arming when parking, deterring thieves and protect your car effectively by loud alarm sound and blink light! PC anti-UV material, waterproof and dustproof, high and low temperature resistance, not afraid of wind, rain and severe cold and heat! Wireless range:10-20 meters Working environment temperature:-20-60 degree An alarm 700MA batteries standby for 6-10 months. A remote need a 12V/27A alkaline battery standby for over 1 year. Colour:Black Material:Plastic Package Contents: 1 * Bike Alarm Taillight 1 * Remote control 1 * 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.