10 Pieces 650nm 6mm 5V 5mW Red Dot Laser Diode Module with Wire Leads This red (650nm wavelength) laser diode module is easily powered by a 5V DC USB power supply or battery and can be used as a pointer, for illumination, and light therapy. Wires for the DC power are soldered to the 6mm brass laser diode housing. The module includes an internal 91-Ohm current limiting resistor, so no additional series resistor or current limiter is required. Simply connect 5V DC power to use! The Red lead is Positive (+), the Blue or Black lead is negative (-). The lens is acrylic plastic and can vary somewhat in its ability to focus to a small spot. If necessary, the spot size can be focused by rotating the threaded brass lens holder in either direction. Specifications: Brass housing with acrylic lensSpot mode: Dot, continuous outputTypical Spot Size: φ10 mm ~ φ15mm at 15 meters (these diodes do not include a collimating lens)Laser wavelength: 650nm (Red)Light power: ~5mW Class 3RSupply Voltage: 5VDC maximum, typically will generate laser output at >3VPower lead length: ~75mmLaser Diode Shell (housing) Dimensions: 6mm x 13.5mmLaser Diode Shell Material: BrassOperating Current: <40mAOperating temperature: -36C ~ 65CStorage temperature: -36C ~ 65CWeight (1 piece): ~1.4 Grams Never look straight at any laser diode while it is operating, or point it at someone’s eyes, as eye damage is possible even with eye-safe lasers like this one. Package Includes:10x (10 pieces) 650nm 6mm 5V 5mW Red Dot Laser Diode Modules with Wire LeadsGet it faster! Stock and ship from our Colorado office for quick US delivery. Please contact us for quantity/OEM pricing. We provide FREE USPS First Class Shipping with Tracking - Not Economy Shipping