This GE MAC 5500 ECG/EKG machine is in excellent working condition. It powers on smoothly, as shown in the photos, and all buttons are fully responsive. The built-in thermal printer functions properly, producing clear printouts. The unit was removed from a working medical environment and is expected to continue operating reliably. Included with the system is a GE CAM-14 Acquisition Module, which is also in excellent working condition and has been tested to function properly.