Cellular Connectivity
4G LTE CAT-1, multi-band support: CN (B1/B3/B5/B8/B34/B38/B39/B40/B41), EU/AU/NZ (B1/B3/B5/B7/B8/B20/B28), LA (B2/B3/B4/B5/B7/B8/B28/B66)
GNSS Positioning
GPS; cold start -149dBm/25s, warm start -155dBm/5s, hot start -165dBm/1s; ≤10m accuracy
Display
OLED touch screen, 368×448 resolution
Battery & Charging
385mAh rechargeable; wireless charging + docking station charging
Physical
45.6×37.6×12.2mm, 28g; IP67 waterproof and dust-proof; black or customized color/wristband
Health Sensors
Heart rate, blood oxygen (SpO2), body temperature; configurable high/low threshold alarms per metric; on/off/restart via SMS
Safety Alarms
SOS (power button long-press or double-click), fall-down detection (adjustable sensitivity), motionless alarm (configurable duration 1-999 min), geo-fence (distance-based, ≤250×10m)
Authorized Contacts
Up to 8 authorized phone numbers; sequential SOS calling — cycles to next number if unanswered
Audio Modes
Two-way call mode, silent listen-in mode, SOS mute call mode, SOS audio call mode; configurable call authorization (restricted to authorized numbers or open)
Alarm Clock
Configurable alarm reminder via device UI or SMS command
Firmware Upgrade
FOTA (over-the-air) and USB
Operating Environment
-20°C to +65°C; 5%–95% humidity
Cloud Platform
FMS GPS tracking platform integration; APN/IP/port configuration via SMS; supports TCP and UDP protocols; GPRS domain name mode
Configuration
Full SMS command set for all parameters; factory reset via SMS; user settings query command
