Gorilla Automotive 9100 Motorcycle Alarm with 2-Way Paging System Ultra-Compact and powerful 120 decibel siren 2-Way Pager receives signals from up to 1/2 mile away - alerting you if the alarm has been activated (3-button remote also included) Three powerful sensors keep your bike safe: A new internal tilt sensor, an adjustable 2-stage shock sensor and a current sensor LED Warning Light indicates the alarm is armed and provides a visual deterrent against theft Simple, direct-to-battery installation takes less than 30 minutes and requires no special tools