Usage Tips:Keyless, password and remote to lock and unlock. Vibrating or removing the lock activates alarm. Cutting cable or removing the battery cover activates alarm. Three wrong code activates alarm. Alarm sound up to 110dB. Programmable 4 digital password, up to 256 kinds of passwords. Remote control to lock / unlock / find vehicle / pair, LED indication. 3 x AAA alkaline batteries operation(not included) and low battery indicator. IP55 waterproof. One remote can control multiple locks or similar remote alarms at the same time. One lock can pair with 8 remotes at most. 3 x AAA batteries (not included) for , life lasts for 3 months. 1*CR2032 batteries for remote, life more than 3 years. Remote-controlled distance :40m Cable specification: length 80cm (40cm/120cm) / diameter:10mm Chain specification: length 80cm (40cm/100cm) / diameter:6mm Working temperature: -10~+60 Storage temperature: -20~+80 Size: 92X55X34mm color:Black Material:ABS Package Contents: 1 x Alarm 1 x Remote control 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 a little different from the real thing. The measurement allowed error is +/- 1-3cm.