•Compatible with the iPhone 5, 4S, and the iPod Touch (5th gen).
•The Merlin Heart Rate Monitor is designed to be used with various applications freely available in the App Store that use real-time heart rate readings to generate valuable information and custom workout regimens based on your past performance, goals and personal attributes.
•Keep track of calories burned on your iPhone or iPod
•Tweak your workout based on live feedback
-Replaceable 2032 Coin battery
-Bluetooth 4.0 transmission range: 10~15m
-5 years power life (1 hr per day)
-Weight : 15 gram
-Sensor Pod: Strap: [19 gram] Total: [34 gram]
Weight: 53 g