- TAKES 3 AAA BATTERIES NOT INCLUDED - LASERABLE FINISH ALL THE WAY AROUND FLASH LIGHT - ENGRAVING AREA: APPROXIMATELY 3" (AROUND) X 1-1/8" (L) - APPROXIMATELY 15/16" THICK IN MIDDLE & 1" THICK AT TOP BY LIGHT & BACK END - ON/OFF BUTTON IS ON BACK END OF FLASH LIGHT - OVERALL SIZE OF FLASHLIGHT: 1" X 3-3/8" (ON/OFF BUTTON ON BACK END EXTENDS 1/16" BEYOND THIS LENGTH) - ACCESS BATTERY CYLINDER BY UNSCREWING THE END ON THE BACK OF FLASHLIGHT THAT THE ON/OFF BUTTON IS ATTACHED TO ANODIZED ALUMINUM - LASERS TO WHITE