NEW GPS S750 Physical Weight: 0.421kg(with battery) Size: 19cm*7.5cm*3.1cm Processor: Xscale PXA255 400MHz CPU Memory: Flash Rom 64MB standard RAM: 128MB SDRAM standard Power Supply: Battery Supply Adapt Battery: 3.7 V 1700mAH Lithium-ion Battery pack(3.7 V 2350mAH High-Capacity Battery Optional) Rechargeable Button Cell Battery backup for data retention (user accessible ) Environmental Guaranteed Operating: -10℃ to +50℃（14℉ 122℉ Storage Temperature: -25℃to+60℃（-13℉to140℉） Husk: Rain and Dust Resistance(classification IP54), Shock,Vibration,Crack Resistance Input/Output Communications: Bluetooth ,802.11b wireless LAN GSM/GPRS(extended port) USB host port and USB device port 10/100 BaseT Ethernet module optional Display: colourful touchscreen,240*320 Resolution, 16 bit true colour, with backlight Audio:Built-in Speaker with volume control Screen: Touchscreen is suitable for finger operation GPS Capability Index Channels: 12 Integrated Real-time:SBAS1 Update Rate: 1HZ Integrated Real-time Difference: WAAS (following-up product technology) time to first fix: 30~40s Protocols: NMEA is a Standard Industrial Protocol for data output (GGA,VTG,GLL,ZDA,GSA,RMC) Postprocessed accuracy Code Postprocessed: Submeter Carrier Postprocessed: With 20 minutes tracking satellites: 10cm With 45 minutes tracking satellites: 1cm Other: EVEREST multipath technology