♥1set: 4 pieces, light source: red light<br><br> Output power: Class II <1mw<br><br> Voltage: 3v-5v, <br><br>
♥Can be used for targeting with sights<br><br> Can be used for laser test tools<br><br> Can be used for medical device positioning<br><br> Can be used to make signal equipment<br><br>
♥Can adjust the focal length by adjusting the tightness of the product<br><br>