Lock & Unlock Mode: This smart electronic lock can be locked and unlocked using a password or remote control. No key is required, offering convenient access. The remote control can operate multiple locks or similar devices simultaneously. The lock supports pairing with up to eight remote controls. Timely Alarm: The electronic lock features a sensitive alarm system that activates immediately if the lock is moved, tampered with, or disturbed. An alarm is triggered instantly if the wire rope is cut or the locking screw is removed. Entering an incorrect password three times will activate the alarm, producing a sound of 115 decibels or higher. IP55 Waterproof & Dustproof: Rated IP55 for protection against dust and water, this lock is suitable for both indoor and outdoor use. It operates reliably in temperatures ranging from -10°C to 60°C. Designed to withstand harsh weather conditions, it helps secure bikes, motorcycles, and other valuable equipment. Four-digit Password: Supports a four-digit password with up to 256 possible combinations. Operation is simple and user-friendly. After setting the password, remember it carefully, as entering the wrong password three times will trigger the alarm. Specifications: Lock body power supply: 3 AAA batteries (Not Included) Remote control power supply: 1 CR2032 battery (Not Included) Lock main battery life: Approximately 5 months or more in standby mode Remote control battery life: Approximately 3–5 years in standby mode Remote control distance: Greater than 40 meters Cable specification: Diameter 10 mm, length 80 cm (optional 40 cm or 1.2 m) Steel chain specification: Diameter 6 mm, length 80 cm (optional 40 cm or 1 m) Operating temperature: -10°C to 60°C Storage temperature: -20°C to 80°C Size: 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 Included: 1 x Lock (Batteries Not Included) 1 x Remote Control (Battery Not Included) 1 x User Manual 1 x Vibration Alarm (Battery Not Included) 1 x Remote Controller 4 x Screws 2 x Screw Caps