Designed for safety the Unilab Solid State Laser is now very low-power (1mW) and is protected by a key switch to prevent it's unsupervised use. The power output places the laser in 'Class 2' as recommended for use in schools and colleges. No damage is likely should a stray reflection of the beam enter the eye at such low power.The wavelength of the light is 635nm which compares favourably with the helium-neon wavelength of 632.8nm.Additional features include:Tapped (M5) exit hole for possible mounting of optical components fibres etc. closest to the point of emergence of the beamLaser support arm (from the laser accessories kit - B8H26151) connects to a tapped mounting point and allows the laser to be supported using an ordinary clamp stand and bossMetal case fitted with 1.8M of mains cable illuminated ON/OFF switch locking key switch with 2 keys250mA fuseThis device is compliant to EN61010-2010 with certificates available on requestTechnical Specifications:Power Output: 1mWLaser Class: Class 2Wavelength: 635nmBeam Divergence: 3mradBeam diameter: 6mm at 5MDimensions: 270mm x 110mm x 110mm approx.Weight: 1.05kg approx.A Laser Accessory Set is available for purchase separately which includes a multitude of different accessories for use with a laser (B8H26151)