Cordless headset based on DECT with DHSG interface, up to 150 meters range and 13 hours of talk time, quick charge function (0-40% in 30 minutes), compact base station with one-touch buttons, intuitive operation on the headset, busy light on the microphone arm and Loudspeaker, noise-cancelling microphone and high-quality loudspeaker for crystal-clear call quality, intelligent volume control and hearing protection (PeakStop), 57 grams lightweight, headband wearing style, connectivity for 2 devices (USB softphone / DHSG landline telephone), DECT security level C. Suitable for ST 31, ST 40, ST 42, ST 45 via DHSG.