♥1set:line is 2pcs, working time>10000 hours ♥ Cable length: 100mm, laser head diameter 6mm ♥ Power output: 5 mw, wavelength: 650nm, voltage: 3v-5v ♥ Can be used for aiming and positioning Can be used for laser test tools Can be used for medical device positioning Can be used for signal generating equipment ♥ Adjustable focal length, according to the tightness of the product High customer satisfaction: 1.The best service, return information ♥We guarantee that we will give you a satisfactory solution. ♥For any reason, if you are not satisfied with our products, you can return them within 15 working days after receiving the goods. ♥Returned goods must be in the factory state again: no defects and no damage. ♥Who pays for shipping depends on the reason for return.