Model: D35 1.CPU+GPS: MTK2503 2.GPRS: Class 12 3. Beidou/GPS signal: BD2, 1561.098MHz / L1, 1575.42MHz C/A code 4.GSM band: GSM 850/900/1800/1900Mhz 5.APP requirements: support Android 2.3 and above systems, IOS6.0 and above. 6.LBS position accuracy: 50-1000m 7. GPS positioning accuracy: 5 to 20 meters (2D RM) 8. WiFi positioning accuracy: 50-200 meters 9. Working temperature: -20 to 70 degree 10. Speed accuracy: 0.1 m / sec 11. Battery capacity: 400mAh 12. Charging time: 2~3 hours Features: (1) Multiple positioning: WiFi+GPS+LBS multi-mode positioning. (2) Real-time positioning: View the dog position in real time. The map interface on the APP can display the dog position. The device positioning frequency is 10 minutes to upload the position by default. (3)Low-power alarm: mobile APP will display the real-time power percentage, promptly remind charging (4) Support AGPS: cold start 35 seconds positioning (5) Remote monitoring: interference-free mode, the family number is forced to connect, and the surrounding environment is monitored. (6) Two-way conversation: Users can talk to each other, and can set multiple family numbers for real-time call. (7) Electronic fence: automatic alarm when the setting range is exceeded (8) Historical trajectory: Query the running trajectory within three months anytime and anywhere. (9) Step counting (10) Waterproof rating: IP67 (11)Free platform: The platform is free to use forever