Wireless Alarm Lock Bicycle Bike Security System With Remote Control Anti-Theft Features: Perfect to protect your shop, office, home, car, house or anywhere requiring protection Wireless Vibration Alarm with infra-red remote control Only the user can unlock the alarm It helps protect your bicycle well, and you don't need to worry about losing it Effective remote control and alarm sensors 10m above the terminal, open area up to 30m Super loud, simple to operate and easy to install Specification: 100% brand new Alarm: powered by 1x 6F22 9V battery (NOT included) Remote controller: powered by 1x L828 battery (Included) Dynamic current: 105db Work temperature: -15~75 Store temperature: -40~85 Environment humidity level: 5%~98% Color: Black Alarm size: approx. 9.5 x 6 x 3.8cm Using method: Press the red button A, fortification will beep; press the B button to cancel the gray, theft will beep twice. Package included: 1pc x Vibration Alarm (Battery is NOT included.) 1pc x Remote Controller 4pcs x Screws 2pcs x Screw Caps Note: Waterproof, but do not imerse the product into water Alkaline 9V battery is recommened to use. (If in cold winter, cold resistance battery is recmmended to use.) Please replace the battery once the alarm sound becomes lower Please take out the battery when not using the alarm for a long time to avoid any damage due to the leak liquid. Please allow 0.5-1cm measuring deviation due to manual measurement.