200285 Dot + Gypsophila 405nm 5mW Blue-violet Laser Pointer Pen - Black (2 x AAA)
Model 200285 Quantity 1 Color Black Material Aluminum alloy Laser color Blue-violet Laser Power 5 mW Wave Length 405 nm Working Voltage 2.4~3 V Battery Configuration 2 x AAA (not included) Functions Continuous output and working time of over 5000 hours; Best choice for teachers professors doctors and so on. Other Feature Output Type: Light beam (without the optical lens) and magnificent starry sky pattern (use the optical lens); Packing List 1 x Laser pointer pen