This listing is for a used Promega Biotec X-Cell 2000 Control Module. The unit can output up to 2000 V (suggested to not exceed 2000 V). The unit is tested and in good working order. The DC voltage charge level indicator responds when the voltage knob is adjusted. Pressing the "discharge" button discharges the voltage. Sold as pictured. Fairly clean unit, some cosmetic scratches and marks present. Power cord included. 100% money-back guarantee! If there is anything wrong with the item that you have purchased, please contact us directly and give. us a chance to help, we respond quickly and will ensure you are satisfied with your purchase and experience! Please do not leave negative feedback or open any disputes with eBay or PayPal. Contact us directly and we will fix the problem quickly.Fast & free shipping We strive for 5/5 Star service! Fast & Free shipping!