Samsung Galaxy Watch3 Bluetooth (45mm) Mystic Black Color Black Display 1.4 inch Super AMOLED(360x360) with 16M Color Depth Operating System Tizen Connectivity A-GPS Processor Dual-Core 1.15GHz Memory 1GB RAM, 8GB ROM. GPS Mode Yes Heart Rate Sensor Yes Wireless Sync Yes NFC Yes Battery 340mAh, Water Resistant 5ATM2 + IP68 / MIL-STD-810G4