Stable strong, penetrating effect is good<br> Laser enters the laser head, high thermal conductivity, easy to penetrate far distance<br> A variety of fiber optic interfaces<br> Aluminum shell<br> Sturdy and durable feel comfortable, pen body with metal texture, more non-slip<br> Can replace accessories Rotate counterclockwise, remove the metal pen head in the front end of the red pen<br> Replace the ceramic core, replace the metal head, and tighten the appropriate strength<br> If you need to detect 1.25mmlc interface, you need to purchase another FC-LC adapter.<br> Specifications:<br> Output power 30MW<br> Service temperature: 0 ~ 60<br> Storage temperature: - 20 ~ 70<br> Battery type No. 5 alkaline battery 2<br> Appearance dimension: 175mm * 26mm * 26mm<br> Product weight 150g<br> Package Included:<br> 1 * optical fiber test pen, 1 * lanyard, 1 * pen bag, 1 * manual<br> Notes:<br> The laser is harmful.<br> It is strictly forbidden to look directly at the red light