... and outside air circulation cooling system. Assembling from 50 watts to 250 watts freely;Wide voltage input, constant current output, ... , compensation, no flicker, start without delay, anti-lighting;Adaptable to any country and region's electricity supply. Environmental protection, energy ... TT, LC, West Uniton or Paypal;3. Shipment: express, such as DHL, UPS door to door service, by sea, by air etc.;4 ...