The MI-009 is the A/C power cord that comes with our M300, M500, and M600 Monolights. Unlike our power packs that usually stay in close proximity to a wall outlet our Monolights need to get closer to the subject, so additional length is needed. In situations where our V240D, V400D, V600D power packs are a bit further from a wall socket, this is a good substitute. The A/C power cord is rated 10amps-125 volts.