Features: Increase remoter Arming and disarming Adjusting touch sensitivity Changing the electrical bell sound. Searching vehicle. SOS functions Battery low indicate Specifications: An alarm need 3 AAA alkaline batteries ( not included ) standby for 6-10 months. A remote need a 12V/27A alkaline battery ( included ) standby for over 1 year. Wireless range: 10-20 meters Working environment temperature: -20~60 degree Working environment: <80% Storage temperature: -30~70 degree Brief Usage:1. Press and hold the arm key of the remote until the alarm sounds a short“Bi”, then shake the alarm and you will hear 3 times short“Bi”, it shows that the alarm is powered on and can be used normally. 2. Pair the first remote: remove the battery of the alarm, 30 seconds later install the batteries, then long press the ringtone key of the remote, after the alarm sound “Bi”, press the arm key of the remote, the alarm will sound “Bi … Bi” to remind everything is fine. 3. Pair another remote: press disarm key of the first remote to make the alarm in disarm mode, then long press the ringtone key of the first remote. After the alarm sounds “Bi”, press the arm key of the new remote, the alarm will sound“Bi … Bi” to remind everything is fine. 4. Note: an alarm can pair maximum 8pcs remotes.