Product main function 1. The most portable and easiest to operate GPS 2. Store up to 16 POIs 3. Return to the starting point or guide to the destination 4. Real-time latitude and longitude coordinates 5. Travel distance time 6. Travel speed and poster height 7. Satellite time 8. You can easily find the attractions you want to reach, and you can easily find where you parked 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 track, -157dbm recapture, -148dbm capture Data protocol: NMA-0183 v3.01 Power supply voltage: USB DC 5V/3.7V 390 mA built-in lithium battery Operating time: about 6 hours