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 times 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 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 alarm lock, life lasts for 3 months. 1 x CR2032 batteries(not included) for remote, life more than 3 years. Remote-controlled distance: equal 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℃ Colour:Black Material:Plastic+Steel Size:92x55x34mm Package Contents: 2 * Bike Lock 2 * Remote Control 1 * English instruction manual 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.