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The unit emits the highest power 635nm red laser light. Projects a brilliant ruby red laser dot. No comparison to cheaper 645~650nm red laser pointers - the Duet® Ruby is twice as bright - visible range of 4,500 ft. (Night) The red laser module operates on 1 pc CR123A lithium battery for superior battery life - forty (40) hours constant on operation!
The Duet® Ruby red laser pointer is constructed of high quality steel & brass components; includes a glass lens for superior laser performance; and features our special APC control circuit. The computerized APC diode drive circuit features "Automatic Power Control". This advanced circuit is based on a photo diode feedback loop. The photo diode monitors the optical output and provides a control signal for the laser diode, helping to maintain the diode operation at a constant optical output level. The circuit adds to the lifetime of the laser, prevents overheating, and provides overall power output stability & efficiency.
2 YEAR WARRANTY