SECURITY the wire rope extracted from the digital combination security padlock can be used as a defensive whip, the diameter of the wire rope is 10 mm and the length is 80 cm. The bicycle chain lock has a four-digit code with 256 code combinations. LONG STANDBY TIME Burglar alarm chain lock has low power consumption, long standby time and low battery indicator. A low battery indicator in the app warns you of low battery when the battery is below 20%. PREMIUM MATERIAL The alarm lock is made of ABS plastic, it is durable, waterproof, anti-theft and high quality material, suitable for both indoor and outdoor use. It is generally used in a temperature range of -10 to +60°C with an alarm sound of over 110 decibels. ALARM FUNCTION when the padlock cuts the wire rope or loosens the locking screw, the bike lock is activated immediately. Shake or move the padlock, and when the password is entered incorrectly 3 times, it activates immediately. WIDE RANGE OF USE smart alarm locks can be used as wheel locks, scooter locks, motorcycle locks and are also very suitable for use in large places such as stores, offices, factories, restaurants, etc. Wide range of applications and high security. Specifications: Power supply: three AAA batteries (not included)Steel rope specifications: 10 mm diameter, 80 cm length (optional 40 cm, 1.2 m)Chain specifications: 6mm diameter and 80cm lengthOperating temperature: -20 ~60℃Storage temperature: -30~+80℃Dimensions: 9.2*5.5*3.4cm/3.6*2.2*1.3 inchesPackage weight: 300g/10.6oz Package list: 1 * Padlock (batteries not included) 1 * Screwdriver 1 * User's manual