1,mini Usb Pc Laser Pointer 2,15meter in control 3, ... 4,Fit for Work and entertainment. 5,CE,FDA,ROHS mini Usb Pc Laser Pointer1,FU brand products,popular in worldwide ... distance>=15meterBatteryAAA*2PCSWavelength532nm(Green) & 650nm(Red)Output power<5mWDimension112mm*40mm*19.2mm(L*W*H)Operation SystemWidows 2000/ME/XP ... control computer of the occasion.FU-Lasers For You! mini Usb Pc Laser Pointer