Automatic voltage regulator, "STAC" type, model ST-3000W, produced by Nippon Keidenki Works Ltd in Japan. Total capacity: 3000 VA. Outputs: Features multiple outlets providing 110V and 220V electrical voltage. Control system: Relies on a digital control system to ensure voltage stability. Usage: Designed to protect home and office electronic devices from electrical current fluctuations. Almost new, very light use. Selling to the highest bidder with a mobile number. Please do not undervalue. Please know the price of the regulator before bidding. Location: Al Khobar. Shipping available to all regions.