All receivers in the Fastrax 300-Series are based on the SiRFstarIIITM single chips, either GSC3e/LP(x), GSC3f/LP(x) or GSC3LT. The protocols and commands are NMEA and/or Sirf binary. The complete Fastrax 300-Series is very high performing including ultra high sensitivity(-159dBm), very fast re-acquisition and marketing leading navigation performance even in urban canyons and dense foliage. Additional features like Adaptive Trickle Power TM, Instant Fix TM, and Extended Ephemeris TM increase furthermore the performance of the receivers based on SiRFStarIII single chips.