This pacer offers fully programmable multi-step sequence protocols can have up to five different pacing and stretching steps – useful for exercise protocols. For electrical stimulation, it emits biphasic stimuli, greatly reducing electrolysis at the electrodes. It has an output voltage of +/- 40 V, a frequency from once every 100 seconds to 99 pulses/sec, and a pulse duration of 0.4 to 24 msec. The EM has flexible pacing protocols that have been designed on request by customers who want to study the effects of arrhythmia or exercise protocols during culture. Gate and Aux outputs allow for increased functionality when used as an acute pacer.