Sennheiser's SD-PRO2 HD Noise Canceling Binaural Wireless Headset has exceptional voice clarity and wideband sound. With a range of up to 180 feet and with line of site, up to 590 feet. Recharges 50% of the battery in 20 minutes, Mute and Volume on Headset, 8 hours of Wideband TalkTime or 12 hours narrowband. Excellent Choice!!!