interesting toy 405nm laser pen pointer 1.Toy,gift ,Project screens, video,teaching 2. Lecture on the evenin sky,museum 1.Toy, ... gift ,Project screens, video,teaching 2.play on the evening sky,museum3 used in traveling,climbing,building,medicineSpecification : ... ×Φ13.2mm2) Appearance and color: rubber black (according to the requests of customers)3) Output wavelength405nm4) Output power:10mW ( ...