:. ... Call Answer / End Button Utilizes DECT 6.0 Technology. - Ensures Call Privacy w/ 64-Bit Digital Encryption. - Provides Top of the Line Audio Quality. - Reduces Interference w/ Other Wireless Devices Noise-Canceling Microphone Volume Control w/ Mute Button Voice Activated Single Earpiece Wireless Headset Supports Wideband VoIP Phones Digital Signal Processing Technology. Enriches Sound Quality Up To 8 Hours Talk Time* Lightweight Increased Clarity / Enhanced Security Up To 395' Range* Reject Incoming Call Call Hold / Call Wait