Laser light can be modulated by varying its intensity. This laser is capable of up to 15% intensity variations at rates up to 1 MHz. The increased brightness can also help students make better holograms. Small movement or vibrations are less likely to blur the picture with a shorter exposure time. Beam can modulate from 85% to 100% of full power. Accepts modulation signals ranging from 50Hz to 1MHz. Effective signal transmission up to several hundred feet. With collimator and detector transmission range increases to thousands of feet. Miniature phone jack accepts audio input signals at l00mV peak-to-peak level and 8 KOhm impedance.