Encore G100 Personal GPS Navigator (Green) Store and locate upto 16 locations Utilizes the latest digital technology: High Sensitivity GPS receiver: 161dBm Tracking,-157dBm re-acquisition;-148dBm acquisition Compact size stores easily in your pocket or purse Protocol:NMEA-0183 V3.01; Assistance:Message based Via NMEA Serial Port Power:USB DC5V and 3.7V 390MA Lithium Battery. Operation Time:Arround 10 Hours; Humidity Range:Up to 80% non-condensing; Current Consumption:Acquisition:-70mA,Tracking :-20mA