Features: Password or remote control completes locking/unlocking without a key. Alarm immediately when shaking or moving the lock. The alarm will be given immediately when the steel wire is cut off or the lock screw is dismantled. Call the police immediately if you enter the wrong password three times. The sound alarm reached more than 115 decibels. Wire diameter 10 mm, length 80 cm. Four-digit password, password combination up to 256 groups. Lock/unlock/lock-seeking car/learning code operation by remote control, LED indication. Lock/unlock/lock-seeking car/learning code operation by remote control, LED indication. IP55 waterproof and dustproof grade, 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. One lock can learn up to eight remote controls. 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 3 months Remote control battery life: standby mode, about 3-5 years Remote control distance: greater than 40 meters Cable specification: diameter 10 mm, length 80 cm Steel chain specification: 6 mm in diameter and 80 cm in length Operating temperature: -10 ~ +60℃ Storage temperature: -20 ~ +80℃ Size: Approx. 9.2 x 5.5 x 3.4 cm / 3.6 x 2.2 x 1.3 in Package weight: 300 g / 10.6 oz Package list: 1 x Lock (batteries not included) 1 x Remote control (batteries included) 1 x User manual 1 x Screwdriver