This product is either discontinued or we cannot get that from suppliers.
Yealink TEAMS-BH72-BL USB Wireless Stereo Headset, Black, Connectivity Bluetooth, Wireless Up to 100 ft, Mono/Stereo, On Call Indicator, Talk time Up to 35 hrs, Speaker Size 35mm.
The Yealink BH72 Bluetooth Headset Series, includes the entry-level (lite) model, alongside the wireless charging full functionality BH72 Bluetooth headset.