Wireless GPS Receiver Chipset: MTK MT3318 chipset * Channels: 32 parallel satellite-tracking channels Bluetooth frequency: 2.4 ~2.48 GHz * Bluetooth Input Sensitivity: -85 dBm Low sensitivity of receiving satellite signal: -159 dBm * Holux M-1000 Wireless Bluetooth GPS Receiver (HOLUX Technology, Inc) * Frequency: 1575.42 MHz