Features 1. Designed with a 115dB alarm function to effectively deter theft, suitable for both indoor and outdoor use. 2. Low power consumption with extended standby time. 3. Anti-cutting, anti-disassembly, removal alarm, and vibration alarm features. Ideal for bicycles, motorcycles, doors, and more. 4. Compatible with iOS and Android systems. Lock and unlock your bike or motorcycle using your smartphone (supports Android 6.0 and iOS 7.0 or later). 5. Constructed from ABS plastic and high-density copper for durability, waterproof performance, and reliable anti-theft protection. Specification Features: Made from ABS plastic and high-density copper, offering durable, waterproof, and high-quality anti-theft performance. Equipped with a 115dB alarm to effectively deter intruders, usable in both indoor and outdoor environments. Provides anti-cutting, anti-disassembly, removal, and vibration alarms. Suitable for bicycles, motorcycles, doors, and similar applications. Low energy consumption with long standby duration. Requires 3 AAA batteries (not included), lasting up to 8 months with average use (twice daily). The app includes a low battery indicator that alerts when power drops below 20%. Compatible with iOS and Android devices. Control your bike or motorcycle lock directly from your phone (supports Android 6.0 and iOS 7.0 or above). Specifications: Material: ABS plastic + manganese steel + copper + stainless steel Color: Red Alarm Type: Acousto-optic Alarm Alarm Sound: Up to 115dB Power Supply: 3 AAA batteries (not included) Operating Temperature: -10C to 60C Dimensions: Approx. 9.2 x 5.5 x 3.4 cm (3.6 x 2.2 x 1.3 in) Package Weight: 792g (27.9 oz) Package List: 1 x Smart Bluetooth Bicycle Lock (batteries not included) 1 x User Manual 1 x Screwdriver