GPS + voice monitor + recorder
Mechanical properties:
Battery 1500 mAh Size: 57x30.7x21.6mm
Battery 3000 mAh Size: 68x45.6x24.1mn
Battery 6000 mAh Size: 68x45.6x34.1mm
Battery 10000 mAh Size:68x102x25.5mm
Positioning mode:
GPS positioning+Beidou
Base station positioning