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AD-90S is a UHF 4-channel power antenna splitter with a maximum output level of +26 dBm (0.4 W), assisting with one transmitter connecting to 4 transmitting antennas. Primarily operates with 4 in-ear monitoring transmitters or 4 wireless interlinking transmitters to send signals through 4 channels with reliable signal transmission and larger signal coverage in multiple directions. Each channel of AD-90S can be connected to a wideband power amplifier to increase signal output power and transmission range, when the antenna is installed in complex terrain or a large building with many partitions.