Features: Wirele remote operation; more simple and convenient touse. Touch sensitivity: There are seven levels from high to low, with seven tones do Le Mi FA So La Si sound effect prompt. SOS function: Turn on the SOS help function, and the help prompt tone will be automatically sent out in case of riding accident to give you multiple guarantees. Wirele control by remote. Easy to install by pasting with double-sided sticker or tying it with strap. Can trigger SOS function and emit call for help automatically when an accident is ocurred to provide more safeguard manner. Volume: There are three levels: high, medium and low. The factory default is the highest sensitivity and maximum volume. 3 ringtones for remote bell sound; long range remote and easy to search the motorbike/bicycle. High efficient with 7 adjustable level of sensitivity, from soft touch to push beat and suitable for all conditions. Use triaxial accelerometer sensor and special calculation to increase accuracy of robber manner reogition and reduce false alams caused by noise interference. Simiar perfomance to motorbike alam, 113dB loud speaker athough instal at a hiding place to fighten the thiefirobber. Suitable for Bikes, Electric Bike, Motorcycles, Scooter, Car, Doors and Windows.Vibration alarm, more accurate identification of theft. Specifications: An alarm need 3 AAA alkaline batteries ( included ) standby for 3-4 months A remote need a 12V/27A alkaline battery ( included ) standby for over 1 year Waterproof Grade:IP55 Waterproof Color:Black Control Distance: Remote operation distance of remote control: 0-25 meters Packing List: 1 x Alarm (including battery) 1 x Remote (including battery) 1 x User Manual 1 x Screwdriver 2 x Double-sided Sticker 2 x Cable Tie