LY‑04R Wireless Vibration Alarm with Remote Control Adjustable Sensitivity for Bicycle Item Type: Vibration Alarm Set Material: ABS Function: Remote Control + Doorbell + Adjustable Sensitivity (10 Levels) + 105db Alarm Frequency: 433MHZ Function: Alarm; Emergency Alarm; Doorbell Working Environment Temperature: -10-60℃ Working Environment Humidity: <80% Storage Temperature: -20℃ - +70℃ Host Battery: 2 x AAA Battery (Battery Not Included) Remote Control Battery: 12V 27A Alkaline Battery (Included) Weight: Approx. 62g / 2.2oz How e: 1. Install the battery on the host first (battery not included) 2. Test whether the remote control can be connected, if it is connected, paste the product host with double-sided tape on the place you need to test, such as doors and window, electric cars, etc. 3. Installation is complete