650nm red line 4mm Mini laser module Industrial Laser Group Module adjustable focal length(4mm)(3pack) - Product Features
- Light source: red light
- Size: 4x13.6mm.Material: Copper. Output power: Class II <1mw Voltage: 3v-5v
- Service life>10000 hours.Working current<40mA
- Can be used for targeting with sights Can be used to make signal equipment
- Can adjust the focal length by adjusting the tightness of the product