Fitbit One Wireless Activity Plus Sleep Tracker

The Fitbit One wireless activity plus sleep tracker is a high-performance fitness monitor, auto tuned to track your sleeping habits, distance walked, steps climbed, calories burned and workout activities. Device comes with a silent alarm, an OLED display screen and compatible with computer and smartphones. Bluetooth 4.0 ensures a seamless transfer of data to external device.

Pros
Very accurate
Quick setup
Long lasting
Bluetooth 4.0

Cons
No alarm
Not suitable for kids