Standard Remote Speaker Microphone (RSM) Audio Created with Sketch. The Standard RSM features a push-to-talk (PTT) and emergency button. Find a partner More accessories ItemPart no.Standard RSM300-00389Compatible with these accessoriesPlease select one more product to compare with. EM2 Ear Hanger (RAC/RSM) More details Please select one more product to compare with. EH6 Ear Hanger (RAC/RSM) More details Compatible with these productsPlease select one more product to compare with. SC20 More details Compare Please select one more product to compare with. SC21 More details Compare Please select one more product to compare with. STP9000 More details Compare Please select one more product to compare with. STP9200 More details Compare Please select one more product to compare with. STP9100 More details Compare