Voyager 520 Bluetooth Earset allows you to quickly switch between two Bluetooth devices. Quickpair technology makes pairing easy. Noise-canceling microphone filters distracting background noise so you can easily be heard while the innovative screen minimizes wind noise. User-friendly, lightweight design offers convenient one-touch call controls and desktop charging cradle. Enhanced ear bud design improves sound. Battery life last up to 8 hours of talk time or up to 180 hours in standby time for a single charge.