Disc brake pad anti-vibration with built-in alarm, power 110db siren. A useful system for safety and protection of the motorcycle - scooter. Reinforced steel trunk, unchanged in weather conditions. the alarm is activated, listening to the characteristic sound and arms at 10sec. The alarm when the siren is activated sounds for 10sec. When we want to disarm we put the key in the lock. The batteries (6 x A76 / LR44 1,5V) need replacement when you hear a prolonged sound. The package includes 2 keys and the batteries.