Wave length: 650nm. Output power: Class IIIa - less than 5mW. 2.6~5 VDC operation. Dimensions: D7 x 21 mm. * Red laser. Ideal laser module if cost is a very important consideration. * This module has an integrated optic, laser diode and APC driver circuit. * APC driver circuit enables constant Laser output power. Aspherical plastic lens provides Dot spot.