Features: Alarm immediately when cutting steel rope or removing lock screw. Alarm immediately when shaking or moving the lock. Call the police immediately if you mistype your password three times. Drawing out the wire rope can be used as a defensive whip,wire rope diameter 10 mm,length 80 cm. Four-digit passwords with 256 password combinations. Lock/unlock button operation,no key required. Powered by three AAA No.7 batteries,8 months standby time and have low power indication function. IP44 waterproof certification,suitable for indoor and outdoor use. It can be used normally at temperatures ranging from - 20 to + 60. Over 110 decibels of alarm sound. Specifications: Power Supply:Three AAA Batteries (Not Included) Battery life:standby mode,about 8 months or more Specification of steel rope:diameter 10 mm,length 80 cm Chain Specification:6mm in diameter and 80cm in length Operating temperature:- 20 ~60 Storage Temperature:-30 ~+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 * Screwdriver 1 * User Manual