Savi 400 Series wireless freedom that won't weigh you down. For PC-based office and remote workers, the Savi 400 Series offers excellent audio quality, up to 300 feet of wireless range and your choice of four wearing styles including the Savi 440 - the lightest DECT headset on the market that features a hot swappable battery for unlimited Talk time and can be worn three ways to match your personal style. Designed to go where you go whether you are in the office or remote, enjoy excellent audio quality, the ability to roam up to 300 feet from your PC, and a high-quality carrying case for increased portability. One-touch call answer/end, VOL+/-, mute and flash for simple call management. Superior audio quality Enjoy DECT technology that provides best-in-class audio while eliminating interference from Wi-Fi networks. Advanced Wideband audio using cat-iq technology provides high definition voice quality while a noise-canceling microphone reduces background noise interruptions, ensuring great audio quality and easing listener fatigue.