N916510882466C Plantronics 86920-01 Wireless Headset Only - DECT 6.0
DECT vs. Bluetooth: How to choose the right wireless headset · Jabra Blog
Sennheiser DW Pro 1 - DECT Monaural Wireless Office headset with base station, for phone only, USB port for upgrade, Activegard + Ultra Noise Cancell -Deals499