Add an audio delay to your CAT-1000, CAT-700B, CAT-300DXL, CAT-300, CAT-250, or CAT-200B controller. When placed in the receive audio path, the DL-1000C will eliminate the first chirp of DTMF tone during muting and the squelch crash noise present on many repeater systems. A dip-switch selects delays of 62.5, 125, 250 or 500 milliseconds. The delayed audio is faithfully reproduced. With the addition of an audio gate, the DL-1000C is fully compatible with discriminator audio.