The Polar H7 Heart Rate Monitor features a wireless bluetooth transmitter which is compatible with a range of devices and is designed to work in conjunction perfectly with the Polar Beat smart app to give you comprehensive feedback. Featuring a soft textile belt which sits comfortably on your torso, the H7 can also transfer heart rate information while swimming with products which support 5kHz transmission. The device is compatible with the iPhone 4S, iPhone 5, iPod touch (5th generation), iPad (3rd and 4th gen), iPad mini and iPod Nano (7th gen)