Ideal for Smart Phone Users - The Plantronics Backbeat 903+ is great for workouts, commutes, or just chilling out at home. Immerse yourself in rich audio streamed from your iPhone®, smartphone or Bluetooth®-enabled MP3 player. There’s even an iPhone® battery meter. Wherever you enjoy listening to your music, never miss a beat or a call with easy-touch button controls. Voice alerts also let you know the status of the battery, music track forward and back, mute, out of range and more. With three levels of size adjustment you can find a perfect comfortable fit for whatever you’re doing, and the ruggedized, flexible design lets you toss it in a gym bag or stow it in the included carry pouch.