1. Easy to install and operate. 2. Good material,more durable. 3. Press the red A button to arm the defense, it will beep once; press the gray B button to cancel the anti-theft, it will beep twice 4. Super loud, simple operation, easy anti-theft 5. Leave the bike for a short time and no longer have to bother to lock it 6. Anti-theft, no worries, protect your car

http://olla.gr/universal-wireless-security-alarm-bicycle-alarm-with-remote-control/