WAHOO TRACKR Heart Rate Sensor

LED indicators: Yes Product colour: Black International Protection (IP) code: IPX7 Maximum chest size: 127 cm Weight: 39 g Minimum strap length: 66,7 cm Maximum strap length: 87,6 cm Mobile operating systems supported: iOS Windows operating systems supported: Yes Mac operating systems supported: Yes Bluetooth: Yes ANT+ enabled: Yes Runtime: 100 hours Connectivity technology: Wireless