Apple Watch Series 4 GPS + Cellular Smartwatch (Black Strap, 40mm)

S4 with 64-bit Dual Core ProcessorYesElectrical Heart Sensor, 2Nd Gen Optical Heart Sensor, Barometer, Aaccelerometer, Gyroscope, Ambient Light Sensor324 x 394 PixelsOLED RetinaUpto 18 hrs (Based on Usage)Black50mmIphone 6 And AboveDigital Crown With Haptic Feedback, Customizable Watch Faces, Receive Notifications