Check the listing for details. 20 PCS 650nm 6mm 5V 5mW Adjustable Laser Dot Diode Module Red Copper Head ##. Condition: New. Listed at 11.29 USD. 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. Simply connect the power to use! The Red lead is Positive (+), the Blue or Black lead is negative (-). Specifications: Spot mode: Dot, continuous output Spot size: φ10 mm ~ φ15mm at 15 meters (these diodes do not include a collimating lens) Laser wavelength: 650nm (Red) Light power: ~5mW Supply Voltage: 5VDC Maximum, typically will generate laser output at >3V Power lead length: ~80mm Laser Diode Shell (housing) Dimensions: 6mm x 13.5mm Laser Diode Shell Material: Brass Operating Current: