The EM-400 is a 4-channel hand-held, push button switch. It connects directly to a transducer input on an iWorx amplifier or computer interface. When any of the 4 buttons are pressed, the EM-400 delivers a signal which is displayed on a channel of LabScribe2 recording software. The RPD-400 is a better Response pad for use the IX-TA-220 or the IX-RA-834.
