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Samsung Galaxy Watch 4 - $100
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Bluetooth 5.0 (ranger greater than 400m, 2 Mbps), WiFi 802.11 a/b/g/n 2.4Ghz+GHz
NFC (near field communication - RFID). GLONASS/Beidou/Galileo
Accelerometer, barometer, gyro sensor, geomagnetic sensor, light sensor, optical heart rate sensor, electrical heart sensor, biolectric impedance analysis sensor.
Model: SM-R810