Green Laser Keychain with Starry Tip 1.Battery:1 x AAA 2.85 X 12 ( ... : 5mw,10mw,20mw,30mw,50mw Features: Green Laser Keychain with Starry Tip * With star pattern & rotate front pattern tip to change ... pattern, you will see sparking stars change variously in the sky* Remove the cap become a standard green laser pointer*Wavelength ...