10pcs 650nm 6mm 5V 5mW Red Laser Dot Diode Module with Brass Diode Housing Specifications:    Brass housing with acrylic lens Spot mode: Dot, continuous output Typical Spot Size: φ10 mm ~ φ15mm at 15 meters (these diodes do not include a collimating lens) Laser wavelength: 650nm (Red) Light power: ~5mW Class 3R Supply Voltage: 5VDC maximum, typically will generate laser output at >3V Power lead length: ~75mm Laser Diode Shell (housing) Dimensions: 6mm x 13.5mm Laser Diode Shell Material: Brass Operating Current: <40mA Operating temperature: -36C ~ 65C Storage temperature: -36C ~ 65C Weight (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 Dot Laser Diode Modules with Wire Leads