Unified Communications Standard DECT Wireless HeadsetDECT Headset: * Binaural Ear (dual ear) over-the-head Headset* Busylight on headset* Leather Ear Cushions* Yealink Acoustic Shield TechnologyDECT Base:* UC Button* Input Ports: 2x Micro USB Port* 2.5mm jack port for Busylight(Optional)* Ringer* Power Adpater