GM-R900

The GM-R900 features; SiRF starIII Chipset 20 Channels all in view tracking Reacquisition Time: 0.1 second High Sensitivity -159dBm Support Standard NMEA-0183 at 4800 bps baud rate The GM-R900 has an on board rechargeable battery powered real-time clock and memory designed for quick satellite acquisition during power-up The GM-R900 has USB driver support for WinXP/2000, linux, MacOS Dimension/Weight: 56mmx53mmx22.5mm/96g