Model:MD-920 Specification: Laser Type: Nd:YAG Wavelength: 1064 nm Mode: Q-Switch Pulse Output: 1,2,3 pulse Pulse Width: 4.5 ns Pulse Repetition Rate: 2.5Hz Output Energy 1. Pulse maximum output: 1 lmJ; 2. Pulse maximum output: 9mJ; 3. Pulse maximum output: 28mJ; 4. Output Energy Regulation: 100%--6% adjustable by 7 steps. Cone Angle: 18° Spot Size: 30 um Aiming Beam Wavelength: 630-680nm Aiming Output Power PC: < 0.4 mW