Plantronics CS50 Wireless Headset Plantronics CS50 Plantronics CS50 Wireless Headset *Discontinued* Replaced by new Plantronics CS540 Plantronics CS55 wireless headset use the new 1.9 GHz voice-dedicated frequency which provides users with strong sound quality for optimal voice and hearing clarity. Using the new voice-dedicated 1.9 GHz DECT standard frequency, business professionals don't have to worry about interference from nearby Wi-Fi networks, cordless telephones, and other wireless office equipment common on other frequencies. The result is a less crowded radio frequency that provides superior audio clarity with no interruptions. ** The Plantronics CS55 shares the sleek, self-contained design of the award-winning CS50 headset system, including its extended boom with brilliant voice clarity and noise-canceling technology — perfect for busy office environments with background noise. When you’re away from your desk, you're still in touch to think and talk on your feet, either answering or ending a call with the touch of a button with the optional Plantronics HL10 Lifter. Note: If you like remote answering, we also offer the Plantronics CS55+ HL10 combo package or the ultimate Plantronics CS55EX Premium package, which includes all the add-on wireless accessories. Key Features: New! Enhanced 1.9 GHz DECT frequency and noise-canceling microphone 10 hours of hands-free talk time, 50 hours of standby time. 64-bit digital encryption Lithium Ion Polymer battery Up to 300 feet roaming distance from office phone Fully recharge the headset in less than three hours. 80% recharged in 1.5 hours Headset only weights 26 grams comes with both over-the-ear and over-the-head wearing attachments. Quickly mute the microphone with the touch of a button Answer and end calls when you’re away from your desk with the touch of a button (requires a Plantronics HL10 lifter sold separately previous part# 69700-01