W5 1.54 inch Full-fit Screen Dual Cameras Smart Phone Watch, Support SIM Card GPS Tracking Real-time Trajectory Temperature Monitoring, 2GB+16GB 1. Available memory: 3GB+32GB 2. Main screen: 1.54 inches 240*240 pixels fully fit 3. Phone book capacity: 200 4. Memory expansion: support 32GB 5. Camera: 2 million front dual cameras, 300,000 rear 6. USB function: 5pin micro usb connector 7. Bluetooth version: 3.0 8. Call frequency band: China Unicom, China Mobile, Telecom (open volte) 4G full Netcom 9. Battery capacity: 1080MAH 10. Positioning method: GPS+WIFI+LBS base station positioning 11. Support MP3 function, recording function, video recording function, alarm clock, real-time step counting, electronic fence, real-time trajectory, tracking and positioning, voice intercom, real-time monitoring, forbidden calls from strangers, class schedule, weather forecast, AI voice robot, etc. 12. Size: 40x16.5x260mm