Designed to be worn on the arm the Wahoo TICKR FIT Armband Heart Rate Monitor is built for your most grueling workouts. An adjustable band provides the most comfortable form factor to record accurate heart rate and calorie burn data. Additionally, the TICKR Fit uses both ANT+ and BLUETOOTH® so you can connect to multiple devices. TICKR FIT is IPX7 water-resistant and has rechargeable battery that lasts up to 30 hours.