Sennheiser EW IEM G4-A1 Monitor Set, Evolution Wireless G4, EK IEM G4, SR IEM G4, 470-516MHz. Part of our AV Components range (microphones & conferencing), supplied through AV Distribution, an authorised South African distributor for professional audio, video and staging equipment. Available to order -- contact us for lead time. Contact our team if you need help confirming compatibility with your existing setup.