The Wahoo TICKR Fit Optical Armband is the forearm HRM for those who want an alternative way to record your Heart Rate and Calorie burn data in the most comfortable form yet. Coming equipped with Bluetooth and ANT+ technology to seamlessly pair with numerous fitness apps, smartphones, and GPS bike computers and watches. Featuring an adjustable band that is designed for your hardest workouts, with water resistant technology and a rechargeable battery that lasts up to 30 hours, what more could you want to help you train better and for longer.