Summary: Type: external module; Screen: no; Name chipset: SiRF Star III; Number of channels of the receiver: 20; Velocity accuracy: 0.1 m/s; Warm start: 38; Antenna type: internal; Elements of power: own Li-Ion; Number of the battery: 1; Battery capacity: 850 mA*h; Connect the external power supply (12 V): yes; The ability to charge the batteries ...