TRRS Link Connector allows link of 2nd WiTalk-Hub with WiTalk-Link Cable for up to an additional 8 more remote headsets for a 17-person system. Operates on Less Congested 1.9GHz Frequency with a remarkable up to 1312-feet (400m) line-of-sight Range. Up to 5-Hours (with 4 Remotes) and 2.5-hours (with 8 Remotes) on a Single Charge with Quick-Change Battery, Included USB-C Charging Cable, and USB-C Powering. Lightweight and Rugged, with Belt Clip and Tactile Volume Control allowing Hub to be used as a belt pack transceiver with WiTalk-LBH for up to a 9-person Intercom System. Full-Duplex Wireless Intercom Base Station for up to 8x Saramonic WiTalk-SRH or WiTalk-DRH remote headsets, and 1x wired WiTalk-LBH Wired Headset.