51 mm - 51 mm - Heart Rate Monitor, Pulse Oximeter Sensor, Barometer, Altimeter, Thermometer, Digital Compass, Gyro Sensor, Accelerometer, Ambient Light Sensor - Clock Display, Alarm, Timer, Stopwatch, Sleep Monitor, Push Notification, Calendar, Text Messaging, Phone, Music Player - Heart Rate, Stress, Sleep Quality, Steps Taken, Calories Burned, Stairs Climbed, Distance Traveled - 32 GB - 1.4" - LED - Touchscreen - Bluetooth - GPS - 672 Hour - USB Type-C - Slate Gray Case Color