Summary: As with all vivitar flash units: you get what you pay for. for $70 this unit is PERFECT for someone that just wants to try a ring flash before investing $2000 into a quality product. Expertise: Pro for 15+ years Problems Encountered: Flashes 100 times or so then burns outnot much as far as settings are concerned. Previous Equivalent Item Owned: Bower Items I Recommend: batteries!!!!!