Summary: Type: external module; Possibility to download maps: yes; Screen: no; Name chipset: SiRF Star II; Number of channels of the receiver: 12; Velocity accuracy: 0.1 m/s; Refresh rate: 0.1 times/sec; Antenna type: internal; Connector for external antenna: yes; Elements of power: own Li-Ion; Number of the battery: 1; Time of work: 10 h; Batte ...