Communicate with a host without a hub CoMo SE 1 Receiver Full-Duplex Wireless Intercom Headset from Accsoon. This remote receiver headset requires one separately available host (master) headset, and allows you to connect to the master plus three additional remote headsets up to 1312' away, providing clear intercom audio for up to 32 hours. The headset does not require an external hub to operate and features a rechargeable battery, adjustable microphone, external antenna, and a single earpiece.