This Macro Ring lite is a useful addition to the range offering both Flash and Continuous lighting for close up macro work. Each kit is supplied with six adaptor rings to screw on to your lens offering a secure fitting of the Ring lite; Adaptor rings supplied cover the most popular sizes of macro lens. 52mm, 55mm, 58mm, 62mm, 67mm,72mm. 1. Simply attach the control unit to the Hotshoe of your camera. (Standard ISO hotshoes only) (Not Sony/Minolta) 2. Connect the lead to the left hand side of the control unit and the other end to the ring light. 3. Attach the correct sized adaptor ring to your lens. 4. Carefully slide the Ring Light unit onto the adaptor ring. 5. Make a choice of F = Flash or C = Continuous on the back of the Control unit. 6. Adjust the power setting as required for correct exposure. 7. Have fun experimenting with the Strobies Macro Ring Light. Technical specifications: Power Source 4 AA batteries, Type Flash/LED