The JPL-Element-BT500D-M is a wireless Bluetooth headset with premium audio speakers designed for music and speech. When mobile phones replace ordinary phones in the office, you need a comfortable and ergonomic solution for those who spend long hours on the phone. The JPL-Element-BT500D-M is such a solution, a truly comfortable headset with good sound quality, built for comfortable all-day wearing. The headset and USB dongle are pre-paired and ready for use. BT-220 Dongle The BT500D-M comes with the USB Bluetooth 5.0 dongle for use with PC and laptops. With the dongle, you can connect your headset to a computer and use it as an audio device for VoIP applications as well as for streaming audio. Softphone interoperability through USB/computer with 3CX, Avaya One-X Agent, Broadsoft UC-one, Cisco Jabber, Counter Path, or Skype for Business with assistance from the JPL Gateway JPL Gateway software must be installed and running for remote call control functions to work with supported softphones.