298 OPTIONSD About VS-1SC vox /ptt caseThe VS-1SC is a VOX/PTT unit for Icom handheld transceiv-ers, and allows you hands-free operation.An optional headset (HS-94, etc.) is required for operation.• The VOX (Voice Operated Transmission) function starts trans-mission without pushing PTT switch when you speak into themicrophone; then, automatically returns to receive when you stopspeaking.Features➥ 9-pin Spring-plug type head SP/MIC plug is equipped➥ Water resistant construction➥ Durable construction➥ Equipped with a PTT switch and revolving clipVS-1SCWater protection coverPTT switchMIC/VOX gainadjusting potVOX/PTT select switchVOX gain and delay adjustmentq Attach the connector of the VS-1SC into the multi-con-nector on the transceiver and tighten the screw.• Toggle the VOX/PTT select switch to [VOX].w Enter user set mode. (p. 15)e Push [P0] several times to select the “VOX Gain” or “VOXDelay” items. Then, push [Side2] or [Side3] to set the de-sired level/condition.r Rotate [VOL] to turn the power OFF to exit user set mode.• VOX GainThe VOX sensitivity level can be adjusted from OFF or 1 to 6(more sensitive).VOX function is OFFX TXCSETCALASET TXCU TXC CALASET TXCU TXCVOX OFF VOX GAIN 3VOX gain level 3(default)X TXCSET[Side2]Push[Side3]