A washable heart rate strap comfortably conforms to your bodyANT+ 2.4 GHz and Bluetooth® Smart wireless digital heart rate sensorANT+ and Bluetooth® Smart allow simultaneous use with both computer and smartphoneFor use with all ANT+ and Bluetooth® Smart wireless technology-enabled devicesIncludes a washable soft strap, heart rate sensor and CR2032 batteryNot for underwater use