The pager unit has options of an audio alarm, vibration alarm or both. The Wireless Alert Alarm is ideal for helping people with reduced mobility who may take a fall, or for ensuring a loved one does not wander off, by providing an early warning of any danger. It is simple to use and reduces the burden on any care giver by providing them with a versatile, reliable monitoring system.The Wireless Alert Alarm system includes a transmitter unit to connect to your choice of Lifemax Sensor Mat and a rechargeable pager unit to pick up an alarm signal within a 30 meter range, when the sensor mat is activated.