Material: SiliconeScreen size: 1 inchApplicable platform: fully compatibleInterface: USB3.0Body memory: 512MOperation mode: mobile APP or GPS Applicable people: business, adult, old man, fashion, public, children1. SOS one-key for help: In an emergency, press the SOS button to send a distress message to the guardian.2. Positioning: base station positioning. (No GPS) (so cheap, you know)3. WeChat intercom, SMS push4. Smart power saving5. Remote monitoring: The high-sensitivity microphone can monitor the sound around the device in real time when the user has an emergency.6. Two-way talk: users can talk to each other, and can set 3 family numbers to talk in real time.7. Electronic fence: delineate an area on the map with the device as the center, APP and SMS alert immediately when the area is out.8. Historical trajectory: query the running trajectory within three months anytime, anywhere.