Features: Password or remote performs keyless locking/unlocking. Alarm immediately when you shake or move the lock. The alarm will be given immediately when the steel cable is cut or the locking screw is removed. Call the police immediately if you enter the password incorrectly three times. The alarm sound reached over 115 decibels. Cable diameter 10 mm, length 80 cm. Four-digit password, password combination up to 256 groups. Lock/unlock/car lock search/remote learning code, LED indication. Lock/unlock/car lock search/remote learning code, LED indication. IP55 waterproof and dustproof degree of protection, suitable for indoor and outdoor use. It can be used normally in the temperature range of -10+60. One remote control can control multiple locks or similar remote alarms at the same time. A lock can learn up to eight remote controls. Specifications: Lock body power supply: 3 AAA #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 3-5 years Remote control distance: more than 40 meters Cable specification: diameter 10mm, length 80cm Steel chain specification:One remote control can control multiple locks or similar remote alarms at the same time. It can be used normally within the temperature range of - 10 + 60. One lock can learn up to eight remote controls.