1. It is made of materials and is durable and easy to use. 2. Press the anti - theft button, and the anti - theft device will enter the anti - theft state, locking the engine to prevent it from running. 3. Press the unlock button, and the anti - theft device will disable its anti - theft function. 4. Click the car - finding button in the parking lot to find your vehicle more conveniently. 5. It can realize keyless start of the vehicle. It has waterproof and dustproof functions and a relatively long service life. 6. Voltage: Compatible with 48/60/72V. 7. Decibel: Approximately 110 decibels. 8. Remote control: Dual remote controls. 9. Applicable vehicle models: Suitable for electric bicycles/step - through motorcycles, tricycles, and electric bicycles equipped with an alarm and with a voltage between 48 - 72V. 10. Material: Plastic. 11. Color: Black. 12. Package contents: - 1 alarm system - 2 remote controls - 1 wiring harness Only the above package contents are included, and no other products are included. 13. Note: Light and different displays may cause the color of the item to vary slightly from the actual object. The allowable measurement error is +/- 1 - 3 cm.