Product Description The TICKR FIT heart rate monitor precisely measures heart rate and calorie data from your forearm. The band is adjustable to fit securely on your arm. Waterproof housing and a long-lasting battery round out the TICKR FIT to give you a reliable training device. Information regarding the return of batteries and electrical equipment:Information on the return and disposal of used batteries and electrical equipment can be found here. Specifications:Heart Rate:yes, underarmSpeed/Cadence:noTechnical Information:Strap Dimensions:260 x 25.4 mm (short), 375 x 25.4 mm (long)Battery Life:up to 30 hoursWaterproof:IPX7Power Supply:lithium-ion batteryData Transfer:Bluetooth 4.0 L.E., ANT+Features:precision measurements with optical heart rate technologycomfortable and secure fitLED indicator lightconnects to fitness apps, smartphones, GPS bicycle computers and watchesCompatibility:Smartphones: Android: upwards of Android 4.3 & Bluetooth 4.0Apple: iPhone 4S or newer and Bluetooth 4.0 iPhone is a registered trademark of Apple Inc., registered in the U.S. and other countries. Manufacturer Number:WFBTHR03 Contents:1 x Wahoo TICKR FIT heart rate monitor1 x Wahoo armband, short1 x Wahoo armband, long1 x Wahoo charger Manufacturer: Wahoo Fitness 90 W Wieuca Rd NE Suite 110 Atlanta GA 30342 USA support@wahoofitness.com Distributor: bc GmbH Carlo-Schmid-Straße 12 52146 Würselen Germany info@bike-components.de