Sonic Research Turbo Tuner ST-200 Strobe tuner. ⚠️Please read the following description carefully before purchasing⚠️ Purchased several years ago, but only used a few times. It was stored wrapped in cushioning material. The box is not included, only the instruction manual and the main unit. ※Please check the condition in the photos. ※Please be sure to confirm any unclear points before purchasing. ※Please understand that this is a used item before purchasing. ※It was working before shipping. ※We do not accept complaints about sound preferences. ※Please check the operation upon arrival and then give your rating. ※Returns are accepted only for initial defects, but please take a video. ※In the case of a return due to an initial defect, for example, if something different from the item we sent is returned, we will take appropriate action, so please be aware. ※Welcome to bulk purchases, we will discount.