Garmin Forerunner 255S Smart Watch - Heart Rate Monitor, Pulse Oximeter Sensor, Barometer, Altimeter, Digital Compass, Gyro Sensor, Accelerometer, Thermometer - Sleep Monitor, Alarm, Clock Display, Timer, Stopwatch, Phone, Text Messaging, Calendar, Music Player, Vibra Alert - Sleep Quality, Heart Rate, Steps Taken, Calories Burned, Stairs Climbed, Distance Traveled, Body Temperature, Pace, Hours Slept - 4 GB - 1.1" - LCD - Bluetooth - GPS - Near Field Communication - 288 Hour - 1.61" - 1.61: