Mini shape, like a watch. Provide the address and distance to the destination. Destination point can be set, record the distance you have traveled and the time you have spent. Provides information about the current position: longitude, latitude and altitude. Speed measurement. Displays the exact time synchronized by satellite. With backlit display.Ideal for drifting / Camping / hiking / climbing. Power consumption: capture about 70 mA, continuous tracking about 30 mA, Ambient temperature: working -20 degrees ~ +55 degrees, storage -30 degrees ~ +55 degrees. Environmental humidity: up to 80% non-condensing humidity. 1x GPS Positioning ( Does not include SIM card and SD card. ) 1x Cable USB 1x Buckle 1x User Manual Receiver: L1 type, C/A code, capture channel: 51, tracking channel: 14 Maximum update frequency: 10 Hz Display image rate: 128x64 Backlight type: blue Memory: 512KB Buttons: 3 buttons 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 Data protocol: NMA-0183 v3.01 Power supply voltage: USB DC 5V/3.7V390 mA built-in lithium battery Operating time: about 6 hours Power consumption: capture about 70 mA, continuous tracking about 30 mA Ambient temperature: working -20 degrees ~ +55 degrees, storage -30 degrees ~ +55 degrees Environmental humidity: up to 80% non-condensing humidity 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings.