Perfect Design-Item Size: 4.44'*3.77'*1.14' inch, 3 kinds bell sound can operate by remote control, easy to find the vehicles position. 3 level adjustable volume. Easy Operation & Installation-With Remote Control, it's convenient to arm, diarm alarm, One-key find vehicle. Two install methods, paste it with double-sided sticker or tie it with straps. Wireless Remote Control Distance-10~25 meters, open place can to 100 meters. 7 level adjustable sensitivity from gently touch to push or beat.You can keep your bike from being stolen in a farther control range, and the sirens can also help you quickly detect. Amazing SOS Fuction-When you are in distress in the suburbs, or fall down accidentally while riding, you can turn on the SOS function to automatically sound the prompt for help, giving you a security guarantee. Multipurpose Bike Alarm-Act as a great bike theft deterrent. Vibrationaly triggered alarm suitable for bicycle, motorcycle, electric bike, electric scooter and so on.