Ⅰ. Protect your bike with a combination lock designed for ease of use and convenience. This compact and lightweight lock features a high-sensitivity deployment probe for efficient and easy installation. With the remote control and alarm sensors, you can enjoy peace of mind with a safe and secure bike. Ⅱ. Key Features: High-sensitivity installation probe: Provides accurate and reliable detection. Easy installation: Simple and efficient installation process for operation. Long-range remote control: Effective remote control and alarm sensors with a range of 10 meters above the terminal and up to 30 meters in open areas. Dual function buttons: Press the red button to arm and the gray button to cancel, with clear audible beeps for confirmation. Vibration alarm: Loud alarm after 20 seconds to deter theft and alert you to potential security breaches. Portable and convenient: Comes with a keychain for easy carrying and storage of the remote control. Ⅲ. Specifications: Material: ABS Color: Black Package weight: Approx. 110g Battery: 1 x 9V battery (not included) Ⅳ. Package includes: 1 x bicycle code lock 4 x screws 2 x nuts 1 x key chain 1 x remote control (with battery) 1 x manual