Wireless Bicycle Anti theft Alarm Door Window Vibration Alarm Intelligent Remote Control Alarm Lightweight and compact size to store or carry.  Simple to operate and easy to install.  It helps protect your bicycle well, and you don't need to worry about losing it. What are you waiting for? Features: Adopted PC material shell, IP 55 waterproof, can use for outdoor. Knocking the door or window can trigger the alarm, which protects your life safety more effectively. Emergency help, sound SOS will remind you of asking help when the accident happens. More accurate catch the theft using three-dimensional displacement sensors and special algorithms. Protect your property safety. Two install methods for you to choose, pasting with double-sided sticker or tie it with strap. Super loud alarm and 7 level adjustable sensitivity, reliable e. Wireless remote control operation, easier e, very practical. Compact, small size and classic design for easy to carry. Specification: Condition: Material: PC Color: Black Alarm size: 9.5 * 4.1 * 2cm / 3.7 * 1.6 * 0.8in Remote controller size: 6 * 3 * 1cm / 2.4 * 1.2 * 0.4in Alarm Volume: 113dB Waterproof: IP55 Loudspeaker Batteries: 3 * 1.5V AAA Remote Controller: 1 * 12V 27A Bell Sound Types: 6 Working Environment Temperature: -20~60℃ Working Environment: <80% Storage Temperature: -30℃-+70℃ Package Weight: Approx. 125g / 4.4oz Package Included: 1 * Bicycle Vibration Alarm 1 * Remote Controller 5 * Accessories Note: 1. The correct installation of this product is waterproof, but not immersed in water. 2. Please allow 0.5-1 inch difference due to manual measurement. Thanks for your understanding. (1 inch=2.54cm)