The APS Compact is ideal to throw into your travel bag when you are going on a trip. The Compact also has 4 outputs (2 Red and 2 Black) with the Pulsed / Continues functions like the MK4.
The APS Compact device comes with the following items:
* APS Compact Device
* Protective bag
* Battery (9V non-rechargeable)
* PALS electrodes