Hollyland Solidcom SE Global 5S 2.4 GHz 5-Person Water-Resistant Single-Ear Headset Intercom SystemThe Hollyland Solidcom SE Global 5S 5 Person Single Ear Headset is what small production teams need to take their communication experience to the next level. It empowers team members to collaborate effectively in diverse settings, including commercial video production and waterside operations. This set includes one master headset single ear version along with four remote single ear version headsets and is apt for 5 persons. 2. 4 GHz Frequency Band