Through bluetooth technology,it transmits satellite navigoction information to the portable devices with bluetooth function such as notebook.PAD.mobilephone ,ect. The bluetooth GPS receiver jd-BG008 features super slim,liglt weight and portable.It can receive up to 16 satellites'information at the some time.positioning sensitivity around 3 or 5 meters. It supports externel antenna.with its powerful lithium battery. it can work continuously up to 15 hours.If not enough. it can also be powered with its accessories such and travel charger; the jd-BG008 Simultaneously support carkit HFP support echo cancellation,support A2DP Profile. Voice transmits: by FM Voice receives: by radio GPS Chip: Prolific GPS Module Frequency: L1,1575.42MHz C/A Code : 1.023MHz chip rate Channels : 32 Antenna(intemal): Buile-in low noise Exteral Antenna Port Active MCX Antenna