Cooling system: High efficiency fan. The aperture effect: Can adjust at will.
Stand Height: 1.2m - 1.5m. Feedback is very important to us. It is impossible to address issues if we do not know about them! Faction is our ultimate goal. We work hard to earn your trust and future business.A If you receive a defective item, you may return it or ask for a discount. Due to time zones, our reply to your questions may not be immediately. If it's non-workdays, please kindly be patient and wait till Monday. This item is in the category "Musical Instruments & Gear\Stage Lighting & Effects\Stage Lighting: Single Units". The seller is "yullstore" and is located in this country: US. This item can be shipped to United States.