Description Model Number : SM-R870NZSAMEA Build : Glass front (Gorilla Glass DX ), aluminum frame IP Rating : 50m water resistant (IP68) Display Type : Super AMOLED Display Size : 1.4 inches Display Resolution : 450 x 450 pixels (~330 ppi density) OS : Android Wear OS, One UI Watch 3 Internal : 16GB 1.5GB RAM Loudspeaker : Yes WLAN : Wi-Fi 802.11 a/b/g/n, dual-band Bluetooth : 5.0, A2DP, LE GPS : Yes, with A-GPS, GLONASS, GALILEO, BDS Sensors : Accelerometer, gyro, heart rate, barometer Battery : Li-Ion 361 mAh, non-removable Charging : Qi wireless charging