Model Name: VL12 Outdoor Three Prevention Health GPS Watchbr BT version: BLE 5.0 can be used as indoor location（Optional）br Waterproof: IP67 or abovebr watch OS: RTOS Thread Xbr LCD: 1.22 inch TFT 240*240 resolutionbr CPU: Unisoc 8910br GPS chip: MTK3333br GPS antenna: LDSbr heartrate sensor: PAH8009 or TBDbr SPO2 sensor: PAH8009 or TBDbr Blood pressure: PAH8009 or TBDbr 3D accelerator: DA217 or TBDbr Frequency band: br GSM 85090018001900mHzbr LTE B1 B3 B5 B7 B8 B20 B38 B39 40 B41br SIM card: nano, compatible with e-simbr Charge port: Magnetic 2 pinbr Button: one SOSPower keybr Dimension: 55x36.5x13.5mmbr Available color: Black, White (for bulk order of min.