Detailed Product Description 4 in 1 laser pointer, laser pointer pen, green laser pointer pen, laser pointerSize:147*10(Dia)mmMaterial:BrassLogo: Print or EngravedBatteries:3pcs LR41Wavlength:650nmOutput Power:ClassII<1mW&ClassIII<5mWFunction:red laser pointer, ball pen, PDA Stylus, led torch