Functions: Password or remote control will complete lock/unlock without key. Alarm immediately after shaking or moving the lock. The alarm will be triggered immediately after cutting the steel rope or unscrewing the safety screw. The alarm sound reached over 115 decibels. Steel rope with a diameter of 10 mm and a length of 80 cm. Four-digit password, password combination up to 256 groups. Locking / unlocking / car lock search / learning remote control operation code, LED signaling. Locking / unlocking / car lock search / learning remote control operation code, LED signaling. IP55 waterproof and dustproof, suitable for indoor and outdoor use. It can be used normally in the temperature range - 10 + 60 ℃. The remote control can control multiple locks or similar remote alarms simultaneously. The castle can learn up to eight pilots. Technical data: Remote control power supply: 1 battery "CR2032" (included) Block main battery life: standby mode, about 5 months or more Remote control battery life: standby about 3-5 years Remote control distance: more than 40 meters Cable specification: diameter 10 mm, length 80 cm Steel chain specification: 6 mm diameter and 80 cm length Working temperature: - 10~60 ℃ Storage temperature: -20~+80℃ Size: 9,2 * 5,5 * 3,4 cm / 3,6 * 2,2 * 1,3 inch Package Weight: 300 g / 10,6 oz List of packages: 1 * Lock (batteries not included) 1 * Remote control (batteries included) 1 * User Manual Please be aware: Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.