Samsung Galaxy Watch Active2 Cellular/LTE 40mm Black Bluetooth Version Bluetooth v5.0 Size (Main Display) 1.2' (30.2mm) CPU Speed 1.15GHz ROM Size (GB) 4 GB RAM Size (GB) 1.5GB Sensors Accelerometer, Barometer, Gyro Sensor, HR Sensor, Light Sensor Infra 3G WCDMA,4G LTE FDD 3G UMTS B1(2100),B2(1900),B4(AWS),B5(850),B8(900) 4G LTE B1(2100),B2(1900),B3(1800),B4(AWS),B5(850),B7(2600),B8(900),B12(700),B13(700),B20(800),B66(AWS-3) ANT+ No Location Technology GPS,Glonass,Beidou,Galileo Wi-Fi 802.11 b/g/n 2.4GHz NFC Yes OS Tizen Technology (Main Display) Super AMOLED Resolution (Main Display) 360 x 360 Colour Depth (Main Display) 16M Dimension (HxWxD) 40.0 x 40.0 x 10.9 mm Weight (g) 42 GM Battery Non removable Typical Usage Time (Hours) Over 43 Hours Low Usage Time (Hours) Up to 95 Hours Battery Capacity (mAh, Typical) 247 mAh Audio Playing Format MP3,M4A,3GA,AAC,OGG,OGA,WAV,WMA,AMR,AWB