SF04R Host Remote Control Door Sensor Bicycle Electrombile Security Wireless Vibration Alarm System

Features : Specially design for bicycle electromobile security, virbration alarm.Wireless remote control to arm or disarm.Compact, wireless, easy to install.Low power consumption, lasting one year. Free to change batteries frequently.Powered by 2 pieces of AAA alkaline batteries.Low power remind with LED indicator.Super loud alarm of 105dB, scare thief away.Can easily mount to windows or doors with included double sides adhesive tape, no tools required.Door bell function, reminding people in house open door for you. Specification : Alarm size: 85*43*15mm/3.3*1.6*0.6inchAlarm volume: 105 dBHost Battery: 2 * AAA alkaline battery operationRemote control battery: 1*27A12VRemote Control Distance: about 30M without barrierBattery life: more than 1 yearWorking temperature: -10 to 50°CWorking humidity: