Compatible with Fanvil X5, Favil X6 Fanvil BT20 USB Dongle Compatible Headsets: Sennheiser Presence UC Sennheiser MB Pro 1 UC Sennheiser MB Pro 2 UC Plantronics Voyager Focus UC Plantronics Voyager 5200 UC QUICK SPECIFICATIONS Standard Bluetooth V4.0 Profiles Bluetooth low energy Dual-mode Bluetooth Frequency Band 2.402G-2.480G Sensitivity -86dBm@.01%BER RF TX Power +6dBm(Class П) Supply Voltage 5V DC(MAX5.75V) Working Current Depends on profiles, 22mA typical Standby Current (Connected ) 0.4uA Operating Environment Temperature -20℃ to +70℃ Humidity 10%-90% Non- Condensing Certifications BQB/FCC/CE Environmental RoHS Compliant