WAAS-enabled, 12 parallel channel GPS receiver Built-in patch style GPS aerial Unit dimensions: 48 x 99 x 24 mm Display: 24 x 38 mm high-contrast LCD and backlight Weight: 106 grams Battery life: 9 hours'' typical using 2 x AAA (sold separetly) Water resistant, IEC-529, IPX7 (Submersible 1 metre at 30 minutes) Position format: Lat/Lon, UTM/UPS, Maidenhead, MGRS and other grids, Loran TDs Electronic Compass, +/-2 degrees (typical), 1 degree resolution Barometric Altimeter, accuracy: 3 metres/ resolution 30cm, range -610 to 9140 metres Data storage, indefinite; no memory battery required Interfaces, RS232 with NMEA 0183, RTCM 104 DGPS data format and proprietary Garmin External power input Waypoints/Icons, 500 with name and graphic symbol, includes altitude Routes: 20 reversible with up to 125 waypoints each Tracks: 10 saved tracks let you retrace your path in both directions Track log points: 10,000 Datums, more than 100, 1 user Number of Grids: more than 15, 1 user World time zones 16 European Languages Games The new Geko 301 offers all software and hardware features of the popular Geko 201, including a built-in electronic compass which provides bearing information while you're standing still. The barometric altimeter determines your precise altitude. It also provides a digital readout of such data as ascent and descent rate, total climb distance and vertical speed. Geko 301 can also plot pressure trends for a 12-hour period, allowing the user to anticipate changing weather conditions.