This has been plugged in but never really used. I had issues with my apple account and couldn't figure out how to sync it.

Fitbit Charge HR is the smart accessory that helps you stay on top of your daily activities (tracking steps, distance, calories burned, floors climbed and active minutes, heart rate monitor and sleep patterns all displayed on the OLED screen). It helps to promote a healthier and more balanced lifestyle, while simultaneously helping you stay on top of call notifications and wirelessly syncing your stats to your compatible smartphone and computer. The Fitbit also features basic time-telling functions and a silent alarm.

Sensors & Components:

Optical Heart Rate Monitor
3-Axis Accelerometer
Altimeter
Vibration Motor
Memory: Stores up to 7 days of motion data, daily totals for 30 days and heart rate date at 1 second intervals during exercise mode and at 5 second intervals all other times.

Syncing: Fitbit is compatible with over 150 leading iOS, Android and Windows smartphones and tablets (Windows Vista and later, Mac OS X 10.6 and up, iPhone 4S and later, iPad 3rd Generation and later, and leading Android and Windows Devices. It uses Bluetooth 4.0 wireless technology to sync to these devices.
Syncing range: 20 feet.

**Syncing to computers requires an internet connection and USB port.
Battery and Power:

Battery life: lasts up to 5 days
Battery type: Lithium-polymer
Charge time: One to two hours
Radio transceiver: Bluetooth 4.0
Materials: The Fitbit is made of flexible and durable elastomer material. The buckle is made of surgical-grade stainless steel.
Wristband size: Large

**Operates in temperatures between -4 degrees - 113 degrees F and at a maximum altitude of 30,000 feet.
**Fitbit is sweat, rain and splash proof, however it is not suitable for swimming or showering.