OTTO RSM with 2.5mm Audio Jack

Browse earpieces compatible with the OTTO OTTO RSM with 2.5mm Audio Jack Remote speaker microphone. The OTTO OTTO RSM with 2.5mm Audio Jack Remote Speaker Microphone features a 2.5mm headphone jack. EarHugger provides both speaker style and tube style earpieces compatible with the OTTO RSM with 2.5mm Audio Jack RSM.