3 Kab Laser

Qhov loj me 6 * 10 * 2.5cm, 3 cais hloov mus rau 3 lub laser kab, txhua qhov nrug deb li 12 hli, cov khoom siv hluav taws xob laser diode wavelength 530nm, laser kab dav 0.1 hli, fais fab mov 2 pcs AAA roj teeb, 3V250mA