Tech specs and what comes in the box

Band Material Thermal plastic elastomer silicone vulcanate (TPSiV)
Display Type AMOLED
Battery Life 48 hours of normal use; advanced functionality like GPS use will impact battery performance
Battery Type Li-Polymer
Maximum Operating Altitude -300m to +4877m
Optical heart rate sensor
3-axis accelerometer/gyro
Ambient light sensor
Skin temperature sensor
UV sensor
Capacitive sensor
Galvanic skin response
Connectivity Bluetooth 4.0 (Low Energy)
Charge Cable Connector Custom charge cable
Display Size 32mm x 12.8mm
Resolution 320 x 128 pixels
Average Charge Time full charge in less than 1.5 hours
Operating Temperature Ranges -10°C to 40°C (14°F to 104°F)
Warranty 1 year limited warranty; additional statutory rights may apply in your country
Additional Technology Haptic vibration motor
Supported mobile devices Works with Windows Phone 8.1 update, iPhone®: 4S, 5, 5C, 5S, 6, 6 Plus, iOS® 8.1.2, and many Android 4.3 or later with Bluetooth®
Water Resistance Water Resistant