Product description This convenient 900MHz wireless headset for VoIP applications lets you take the conversation wherever you go with remarkable range and sound quality for crystal clear communication. Amazon.com The convenient Plantronics CS50 Wireless Office Headset System lets you take the conversation wherever you go with remarkable range and sound quality for crystal clear communications. The Plantronics CS50 combines the clarity of traditional corded technology with the mobility of wireless, so employees can move around the office to wherever business takes them--without interrupting or missing a call. Fully recharge in just three hours. View larger The CS50 wireless headset let's you leave your desk without leaving your calls behind The Plantronics CS50 Wireless Office Headset System brings the ultimate in mobility and sound quality for hands-free conversations to your desk phone. Totally wireless, the CS50 gives you up to eight hours talk time and the wireless convenience to roam up to 300 feet while having secure conversations. The headset continuously charges in the cradle, and when in use, taking or ending a call is as simple as pressing a button. Compatible with typical office or PBX-based phones, the CS50 headset can be worn on either ear or over-the-head for maximum, long wearing comfort.One-Touch Control for Mobile Multi-TaskingWhether you're conferring with colleagues, walking to the printer, or pouring a cup of coffee, there's no need to interrupt important calls. The Plantronics CS50 works up to 300 feet from a desk phone. Its convenient operation allows you to answer, end, and mute calls on the headset with the touch of a button.Noise-Canceling Microphone for Clearer CallsAn extended boom and noise-canceling microphone filter out background sounds for heightened speech clarity. Enjoy the audio quality of corded handsets, but without the tether.Up to 8 Hours of Talk TimeThe CS50 gives you up to 8 hours of unencumbered talk time and the option of remote answering (with Plantronics HL10 Handset Lifter, sold separately), making sure you'll never miss calls when away from your desk or workstation.Fast RechargeRecharging time for the CS50 is quick: it fully recharges in three hours, and can achieve an 80% charge in just an hour and a half. Talk longer with less downtime. Technical SpecificationsTalk Time: Up to 8 hoursStandby Time: Up to 70 hoursRange: Up to 300 ftOperating Frequency: 900 MHz digitalSecurity/Privacy: Digitally encryptedHeadset Microphone: Noise-cancelingHeadset Weight: 26 gHeadset Controls: Volume, Mute, Call Answer/EndBattery Type: Lithium Ion PolymerBattery Recharge Time: 1.5 hours (80%) / 3 hours (100%)Compatibility: Most office or PBX-based telephonesWearing Styles: Convertible: over-the-ear, over-the-head, behind-the-head (with accessory neckband)What's in the BoxHeadset, headband, earloops, AC charger, PerSono Suite software CD