Control unit for Jabra Engage corded headsets. Enables easy call control with adjust volume, mute, speed dial, answer and end call functionality. Stay-flat design. USB-C connectivity. Control unit for Jabra Engage corded headsets. Enables easy call control with adjust volume, mute, speed dial, answer and end call functionality. Stay-flat design. USB-C connectivity. Certified for Microsoft Skype for Business in combination with Engage 50.