IMPRES large remote speaker microphone with 3.5mm Jack, Emergency

RSM with loud audio, 3,5mm audio jack and emergency button. This RSM features IMPRES technology, providing superior audio by suppressing ambient noise, improving voice intelligibility and amplifying quiet transmissions. Built to survive, this RSM is approved to IP54 meaning it can withstand water splashed from all directions and dust won't affect the operation no matter what. The 3.5mm audio jack supports a discreet, receive-only earpiece.