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Try this new generation GPS receiver: i-Blue 737 Bluetooth GPS Receiver. i-Blue 737 Bluetooth GPS Receiver based on new MTK chipset which offers best accuracy and highest sensitivity. When you use i-Blue 737 for the first time, just power up and place the receiver under the windshield in car. Anytime when a paired PDA or laptop computer with Bluetooth connectivity is onboard, i-Blue will wake up on Bluetooth for your navigating usage. When Bluetooth signal is not present, i-Blue will go into sleeping mode automatically (Slow blinking blue LED). The patented Smart Power Save and Auto On/Off technology offers 25 hours battery life on one single charge. i-Blue 737 Bluetooth GPS receiver is equipped with the new 32 channel MTK chipset which offers ultra high sensitivity at -158dBm. i-Blue 737 supports DGPS (RTCM protocol, WAAS, EGNOS, MSAS) for great accuracy at 2.5m.