INDUSTRIAL/LAB 3.7-4.2V 3VDC 532nm Green Laser 50mW Diode Module

Features:
Output Power 50mw 
Wavelength 532 nm 
Working Voltage 3V (2xAAA batteries)
Working Temperature ＋15 ℃~＋35 ℃ 
Duty Cycle 30 seconds ON, 15 seconds OFF 
Laser Shape Dot
Focusable N/A 
Material and Color Brass 
Spring is Negative -, bronze casing is postive +
Dimensions ￠12 mmX50mm(including PCB)
with switch and spring on the PCB, can be used to DIY laser pointers

Package:
1x 3.7-4.2V 532nm 50mw Green Laser 50mW Diode Module