... tracker, small, waterproof, long standby, sos, alarm, voice monitor Applications: Monitoring for children, elderly, disabled and pets; Protection ... Track by interval or on demand; SOS alarm; Low power alarm; Over speed alarm; Geo-fence alarm; Parking alarm ... -inMicrophoneHigh sensitivityBattery3.7V/820mAh li-ion batteryStandby Time66 hoursExterior Power SupplyDC 4.2 – 5.5V, 400mADimension78×48×20mmN ...