SUNPAK G-4500 Grip Type Strobe Power source: Uses 6 AA batteries. Operation confirmed with 6 AA batteries. READY lamp lights up, and flash confirmed with the test button. Everything in the photos is included. Items not in the photos, such as the instruction manual, are not included. Please note that batteries are not included. This is a used item, so there may be scratches and stains. Please understand the above before purchasing.