Bluetooth GPS 20 Channel Receiver w/Sirf Star III Bluetooth GPS Receiver (Gopass Technology Corp.) General Features: SiRF Star III chipset GPS and Bluetooth receiver in one 20 channels all in view tracking High Sensitivity: -159 dBm Fast TTFF (time to fix first) Rechargeable Li-ion battery Built-in low noise high sensitivity patch antenna Superior sensitivity for urban canyon environment Status LEDs