Unified Communications Standard DECT Wireless Headset. DECT Headset:, Monaural Ear (single ear) Headset, Busylight on headset, Leather Ear Cushions, Yealink Acoustic Shield Technology. DECT Base:, UC Button, Input Ports: 2x Micro USB Port, 2.5mm jack port for Busylight BLT60(Optional), Ringer, Power Adpater
