The laser diode produces a narrow intense light beam, 650 nm (red). To avoid eye damage, do not look directly into the laser beam. Operating voltage: 5 V Operating current: 20 mA Wavelength: 650 nm Color: Red Dimensions: 18.5 mm x 15 mm [0.728 in x 0.591 in] Operating temperature: -10° C to -�40�C (14�F to 104�F) � output power: 1 mW