Specifications: The world's most portable and easiest GPS operation. It could store up to 16 points of interest. You can return to the starting point or lead to the destination. The GPS displays real-time latitude and longitude coordinates. It also displays travel distance time, travel speed and poster height, satellite time. Item Name: GPS Locator Memory: 512KB Buttons: 3 Buttons Receiver: L1 type, C/A code Capture Channel: 51 Tracking Channel: 14 Maximum Update Frequency: 10Hz Display Image Rate: 128 x 64 Backlight Type: Blue Accuracy: positioning, 10 meters (supports differential correction system area 2 meters), speed, 0.1 meters per second Initial Positioning Time: about 5 seconds for hot start, about 40 seconds for warm start, about 2 minutes for cold start Sensitivity: -161dbm Tracking, -157dbm Recapture, -148dbm Capture Power Supply Voltage: USB DC 5V Battery: 3.7V 390mAh Battery (Included) Operating Time: About 6 Hours Advantages: Capture About 70mA, Continuous Tracking About 30mA Ambient Temperature: Working -20 Degree Celsius ~+55 Degree Celsius, Storage -30 Degree Celsius ~+55 Degree Celsius Environmental Humidity: up to 80% Non-condensing Humidity Material: ABS Features: Universal, Compass, Navigation Size: 6.5cm x 5.2cm x 2.1cm/2.56" x 2.05" x 0.83" (Approx.)