Item Length:10cm Item Width:6cm Model Name:Motorcycle Wireless Remote Control Alarm Item Height:4cm Item Type:Locks & Latches Item Weight:100g Material Type:PVC Wireless Bicycle Anti-Theft Alarm Bell with Remote Control Scooter Electric Horn Safety Alarm for Bike Cycling Accessories Feature: 1. Easy to use. 2. Easy to install. 3. The unlock key can be used as a car search, and the response volume is lower than the alarm tone. Specification: Name: Bicycle Wireless Remote Control Alarm Material: PVC Color: Black + Blue Alarm Size: About 100x60x40mm/3.94x2.36x1.57in Remote Control Size: About 55x40x15mm/2.17x1.57x0.59in Net Weight: About 85g Power Supply: 9V Battery (Battery Not Included) Usage: Press the red key to set the alarm, it will beep once; press the gray key to cancel the alarm, it will beep twice. How to use: Fix the alarm on the bicycle frame, press the start button, after a delay of 5 seconds, the alarm will be alert, when someone touches the vehicle, the alarm will sound a sharp alarm for about 20 seconds and then automatically enter the alert state. Touch again that alarm again, the user can be closed in accordance with the password shown on the product. Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 X Bicycle Horn (Battery Not Included)