TOUS D-Connect Smartwatch with gold-colored IPG steel bracelet Dimensions: 38.8 mm x 39.5 mm OS compatibility: Android 7.0 and iOS 12.0 or higher. Display / LCD: touchscreen 1.40 inches TFT-DLC in color (Full Touch). Connectivity: Bluetooth version BLE 5.0. RAM: 128 kb Battery: 180 mAh, 3.8 V lithium-ion/2.9g rechargeable battery, rechargeable with magnetic cable, 5-7 days in operation and 8-10 on standby. Chipset: Realtek RTL8762CK and heart rate: HRS 3300. Waterproof: IP68. Functions: 8 TOUS faces + 4 interchangeable faces from the TOUS WEAR APP, hours, minutes, month, day, day of week, daily activity with step counter, calorie counter and distance traveled in miles or kilometers, sports (walking, running, treadmill, step, horse riding, elliptical, yoga, fitness, rowing, HIIT, spinning, cycling, tennis, cricket and skipping rope), heartrate, sleep monitoring, blood pressure (approximate), blood oxygen level (approximate), menstrual cycle notifications (call, WhatsApp, email, SMS, Facebook etc.) weather information, 1/10 second stopwatch, music control and camera control. Milanese mesh closure with safety clasp.