The OEM Plantronics CS510 headset is designed for office phone use, offering superior comfort and mobility with a range of up to 350 feet. It features digital encryption for secure conversations and utilizes voice-dedicated, 1.9 GHz DECT technology to ensure high audio quality. With a talk time of up to 10 hours, the battery can be 80% recharged in just 1.5 hours and fully recharged in three hours. This over-the-head, one-ear headset includes a Noise Cancelling microphone, but please note that a lifter is not included.