Plantronics APV-6A EHS Adapter Features - Communicates directly with the phone from your wireless headset base unit Eliminating the need for the HL10 Remote Handset Lifter Compatibility - Plantronics Wireless Headset CS50 CS55 CS70N CS351N CS361N Plantronics Phone 1608 1616 2410 4630 5410 6416DM 6424DM 9620 9630 9640 9650 9670 Manufacturer - Plantronics, Inc Product_Model - APV