The Shure WA360 switch is an in-line device used to remotely mute Shure lavalier microphones. This handy device may also be used as an audio on/off button, a push-to-talk switch, or a cough button. The WA360 is compatible with any Shure microphone featuring a Switchcraft TA4F connector. These include Models 839W, WL83, WL83A, WL84, WL84A, WL93, WL183, WL184, WL185, WH10TQG, WH20TQG, WCM16,SM83A, SM84A, MX183, MX184, and MX185. The SLX1 system uses a TA4 type connector - so the WA360 should work.

it does stay clicked in then, clicks out when pushed again. they would have to just feel the height of the button I suppose.