Support Y/L WF40 WiFi USB Dongle for SIP-T27G,T29G,T46G,T48G,T46S,T48S,T52S, Supports Yealink SIP-T46G Model Answer/terminate calls through wireless headset | Wideband audio support USB 2.0 Interface | ✅ Key features: Bluetooth 1.1, 1.2, 2.0 and 3.0 for wide-ranging use | Interface Supports Y/L : SIP-T46G, SIP-T48G, SIP-T29G Specification V4.0, back compatible with Bluetooth 1.1, 1.2, 2.0 and 3.0 for wide-ranging use. Model: BT40 USB Bluetooth Headset Dongle Adapte Type: Conventional System Does it works with Y/L T48G? | YES We use these primarily to connect headsets. Supports Y/L SIP-T46GWideband audio support- Answer/Terminate calls through wireless headset- 10m Range Y/L BT40 USB Bluetooth Dongle for SIP IP Phones and Microfiber Cloth