Jabra SPORT PULSE Wireless Bluetooth Stereo Earbuds with Built-In Heart Rate Monitor (Certified Refurbished) This Certified Refurbished product is tested & certified to look and work like-new. The product is backed by a 90 day warranty. Wireless Sports earbuds with Dolby sound enhancement and biometric built-in heart rate monitor. Control music and calls directly from the headphones in-line controls IP55 Certified, drop, strength, dirt, temperature & humidity tested - US Military Standard Works with most popular fitness applications on iOS and Android devices to provide pace and distance alerts Comes with connected earbuds only.