【9User Wireless Intercom】WiTalk WT9D Dual-Ear Wireless Headset is an 9-Person Wireless Intercom System for Professional Film, TV, Stage Productions, Sports, and More with True Full-Duplex Operation for up to 9-People. 【Dual-Ear Remote Headset】Lightweight and Comfortable Dual-Ear Headsets with Hands-Free Operation, Gooseneck Mic Lever or Button Muting, Volume Control, and Rotating Earcups with Leatherette Earpads. 【Portable Hub】Hub Base Station features Belt Clip and Tactile Volume Control allowing Hub to be used as a belt pack or stationary transceiver with included WiTalk-LBH Headset. 【Higher Productivity】Remarkable up to 1312-feet (400m) line-of-sight Range, Up to 18-Hours Remote Headsets – 3.2-Hours Hub Runtime on a Single Charge with Quick-Change Batteries, Included 10-Bay Charger, and USB-C Powering. 【 Easily Add More User 】Easily Expandable to up to a 9-Person System with a WiTalk-SRH Single-Ear or WiTalk-DRH Dual-Ear Wireless Remote Headsets.