1. Basic functions: multiple positioning, two-way communication, remote photography, voice monitoring, super waterproof, electronic fence, low battery reminder, historical trajectory, autonomous dialing, sports monitoring, call fire prevention 2. Positioning: GPS+Beidou+WIFI+LBS precise positioning, about 10-30 meters 3. Battery: Gel polymer 420mAh 4. GSM frequency band: 850/900/1800/1900 5. Positioning data upload: upload every 10 minutes 6. Working voltage: 3.3-4.2V DC 7. Power: 30W 8. GPS sensitivity: -159dBm 9. Waterproof rating: IP68 10. Support languages: Chinese, English, Russian, German, French 11. Screen: 1.33 inch IPS screen 12. Resolution: 240*240 13. Organic tempered 3D glass 14. Watch strap pacifier material 15. Watch case baking varnish UVA wear-resistant metal baking varnish 16. Weight: about 48 grams 17. Size: about 4.7x3.85x1.6 cm