WiTalk SMH is a single-ear Master headset for the Saramonic WiTalkWT5D full-duplex wireless intercom headset system which offers two-way communication at a range of up to 400m.It can work with four WiTaik SRH Remote headsets simultaneously,allowing up to 5 people to communicate at the same time.Thanks to its hands-free design,the WiTalk SMH is ideal for applications where teams need full use of their hands,such as filmmaking,sports events,production crew communication, etc.