The Savi 8200 series offers professional-quality DECT sound for a premium listening experience in two modes: stereo (Savi 8220) and mono (Savi 8210). The Savi 8220 offers stereo hi-fi sound, whether you are calling your customers and colleagues or listening to music. Plus, the Active Noise Cancellation (ANC) feature blocks out background noise so you can always stay focused on what's important. The Savi 8210 is ideal when you need to be called, but also to hear what's going on around you. Line of sight range up to 590 feet/180 meters. Up to 13 hours talk time, up to 50 hours standby time. Call controls: call answer/end, mute, volume +/-, ANC on/off, power on/off. Sold by each. Black.