Haicom 405iii is powered by sirf star iii chipset is a new-generation GPS chipset that has extremely high sensitivity, lower power usage and more rapid time-to-fix. It works very well even in reduced visibility environment or weak signal tracking such as traveling in mega city and surrounded by tall buildings. With hi-405iii, your mobile devices such as pocketpc, laptop, tabletpc, etc. Can receive GPS data wirelessly The advantages of hi-405iii: Bigger battery pack (1600ma) for longer continue working without changing or charging battery during navigation. Bigger antenna reflective ground for better GPS satellite reception and electrical interference. Bigger BT GPS unit for more stable placement in car. By connecting the optional mini-1394 to PS/II connecting cable, hi-405bt can be used as a regular PS/II GPS receiver. By using the inclusive charger sets, hi-405iii can be charged from DC (car cigarette lighter), AC (home AC power outlet), and the USB port from laptoppc. Main features 20 channels all-in-view tracking 10 meters 2d rms position accuracy 0.1 seconds reacquisition Mmcx rf external antenna connector Support standard nmea 0183 protocol at 4800 bps baud rate Support trickle power and power saving mode