Stream music to the headphones from any Bluetooth enabled music phone or computer : Built-in rechargeable lithium-ion battery for up to 23 hours of non-stop music and 19 hours of talk : Lightweight, comfortable over-the-ear design with ear cushions : Play/pause/skip/forward tracks, all from the headphones : Answer/ignore calls with the push of a button : Requires Advanced Audio Distribution Profile (A2DP) Bluetooth 2.0 connection, up to 66-foot wireless range .