Battery – Headlight* swivel mounted with 55 mm (~2,16 inches) pane and switch, simple quality plastic, black dimensions: 80 x 145 x 40 mm (~3,15 x 5,71 x 1,57 inches) for 2 mono (LR 20) batteries (not included) headset clip must be ordered seperately (not included) Articles marked with* are not made for public use according to the german StVZO. (ONLY important for buyers from GERMANY!!!)