Power Saving Green Laser Pointers Match Adjustable Focal Length With Starry

301 Laser Pointer Pen Power Adjustable Focuing Red Laser Pen 650nm Light Burning Beam+18650 Battery+Charger For Teaching Features: Simple and easy to use Adopts the latest technology optics and microelectronics External focus, convenient to adjust light beam thickness Use your laser pointer to point at any desired targets on projection screen Power saving, lightweight, suitable for putting in your pocket or handbags This laser pointer can be used for presentation, teaching