Features:Long Standby Time: With a 3.7V 3400mAh Li-ion battery, can standby up to 90 days.Powerful Magnetic: Built-in powerful magnets, can be very easily installed.Remote Voice Monitoring: Touch the voice icon, it will call you to monitor the voice around the device!Shake Alarm: It will send message to the admin number when the device get shocked.History Route Playback: You can track the history route of the device up to 3 months via both the web platform and APP!