Solidcom M1 is a 1.9GHz full-duplex professional wireless intercom system that supports 8-channel belt packs with simultaneous communication and cascade connection of multiple devices. All eight belt-pack operators can talk simultaneously or they can split to talk simultaneously in up to three groups. The built-in panel antenna, can achieve up to 400m one-way transmission range in front of the panel and an extra 50m range at the rear. The auxiliary external antennas offer 300m transmission within a 360 degree range. This is a flexible intercom system suitable for church events, field productions, exhibitions and concerts etc.