Specifications Color: Orange/Army Green Refresh rate: 1 Material: ABS Storage capacity: 512KB Memory:4MB (user memory 300 kbye) Accuracy of positioning: 5-15m Battery: Built-in lithium-ion battery Working Time:about 10 hours Screen size: 1.4inch Dimensions: 65*53*21mm Package included: 1 x GPS Positioning(No SIM Card and SD Card Included) 1 xUSB Cable 1 x Buckle 1 x English Manual Features 100% Brand new and high quality Mini shape, just like a watch. Provide the direction and distance to the destination. Destination point can be set, maximum 16 points. Record the distance you travelled, and the time you spent. Provide current position: longitude, latitude, and altitude information.Speed measurement. Display accurate time synchronized by satellite. With an extremely long waiting time. With back-lit display. Ideal for Drift/Camping/Hiking/Climbing. Woring for 8 hours maximum. Technical indicators Receiver: L1 type, C/A code, capture channel: 51, tracking channel: 14,Maximum update frequency: 10 Hz, Display image rate: 128*64, Backlight Type: Blue Appearance size: 65*52*21mm Memory: 512KB, Keys: 3 keys, Accuracy: Positioning, 10 meters (supporting 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 trace, -157dbm recapture, -148dbm captureData Protocol: NMA-0183 v3.01 Power supply voltage: USB DC 5V/3.7V 390mAh built-in lithium battery Operating time: about 6 hours Power consumption: about 70 mA for capture, about 30 mA for continuous tracking Ambient temperature: working -20 degrees ~ +55 degrees, storage -30 degrees ~ +55 degrees Ambient humidity: up to 80% non-condensing humidity Notes 1. Please allow slight measuring deviation due to manual measurement. 2. Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you 3.Please leaving a message before you give the bad feedback, if the products have some problems.Thanks for your understandings.