Dimensions: φ12x51mm( with PCB circuit size) Output Wavelength: 532nm (+-10nm) Output Power :<50mW Laser Shape: Dot Beam Divergency: <1.5mard Shell material: Brass Circuit Control: ACC line Reverse Polarity Protection: Yes Working Voltage: DC = 3.7V Working Current: I <250mA Warm-up time: None Operating temperature: 10 ℃ ~ +40 ℃ Storage temperature: -10 ℃ ~ +55 ℃ Package: 1 x532nm Dot Laser Module Note:532nm Green Laser is made by 808nm Laser Diode plus Crystal lens to transfer Green Light, it needs preheat 2-5seconds under 10 °C.In lower temperature when Green Light is weak at beginning,after preheat it will turn bright .It is normal.