PilotLines KEY02 ZigBee HA Smart Home Alert Wireless Security Alarm System Access Control Key Arrival Sensor Tag with SOS Exceptionally long battery life. Over two years' standby Real Time Alerts to Mobile Phones for emergency happened The suitable age range for the Panic Alarm Button is open to anyone pressurised with a hectic life! Additional Requirements: PilotLines Smart Home Gateway Hub Trigger different actions to take place when you arrive or leave home, such as automatically turn