Wireless vibration alarms with remote by detecting gentle touch, push or beat (vibration triggered) Remote control range up to 25M, 10 levels adjustable sensitivity, Low-consumption design,which makes it can work at least a year Alarm need two AAA batteries to operate ( not included ), Remote need a 12V/27A alkaline batteries to operate ( included ) 4 Mode-- Arm/Disarm/Panic/Doorbell mode, Not only a safety/antitheft alarm, but also a Doorbell, in doorbell mode, the vibration alarmdetects vibration the host sound"Dingdong". Low battery warning The factory default is the highest sensitivity (the first level). Please set it before use according to your need. 1. Press and hold the Disarm key of the remote control (Ignore the prompt tone). The remote control's LED turns off for about 3 seconds and lights up again after 3 seonds, then release the Disarm key and press the doorbell key to adjust the sensitivity level. 2. When it's in the highest sensitivity, the alarm will sound a long