Features: Password or remote control completes lock/unlock without key. Alarm immediately when shaking or moving the lock. The alarm will be given immediately when the steel rope is cut or the lock screw is disassembled. Call the police immediately if you mistype the password three times. The alarm sound reached more than 115 decibels. Wire rope diameter 10 mm, length 80 cm . Four digit password, password combination up to 256 groups. Specifications: Lock body power supply: 3 AAA No. 7 batteries (Not Included) Remote control power supply: 1 "CR2032" battery (Included) Lock main battery life: standby mode, about 5 months or more Remote control battery life: standby mode, about 3 to 5 years Remote control distance: greater than 40 meters Cable specification: diameter 10 mm, length 80 cm Specification of steel chain: 6mm in diameter and 80cm in length Operating temperature: to 10 ~60 Storage Temperature: to 20 ~+80 Size: 9.2*5.5*3.4cm/3.6*2.2*1.3in Package Weight: 300g/10.6oz Package List: 1 * Lock (Batteries Not Included) 1 * Remote Control (Batteries Included) 1 * User Manual