Microsoft Band 2

• Continuous heart rate monitor tracks your heart rate, calorie burn, and sleep quality
• Works with Windows Phone, Android and iPhone
• Get email, text, calendar, and call alerts on the go
• Tracking for running, biking, golf, and more…
• Microsoft Band helps you live healthier by tracking your heart rate, exercise, calorie burn, and sleep quality, and helps you achieve more with email, text, and calendar alerts at a glance.
• Advanced sensors track data specific to running, biking, and golfing.
• Technology from Microsoft Health gives you actionable insights based on your data.
• Battery has limited recharge cycles and cannot be replaced.

Reviews:

“The magnet based clip is very secure.”

“The screen is very sharp and I find it easy to use in almost all lighting conditions.”

“Integrated Battery that possibly cannot be replaced?”  

“Everyone should have one, so much better than the fitbit”

“Better than expected, the only things to improve would be battery life and a more accurate heart monitor.”