Our green lasers have been used in many applications and industries including the military, medican and astronomy, indicator, teaching baton KEY FUNCTIONdynamic liquid skyanimated moving stars ( you need to manually turn around the pen cap for different laser patterns)fully adjustable motion speedall this wonder and beauty of the night sky happen in your roomtake the pattern cap of SPECIFICATIONSopration voltage: 3Vbattery: 2*AAAbatterygreen laser wave length: 532nmoutput power: less than 50nw( we can do 20nw and 30nw extra)storage tempetature range: -10~+50color: BLACK  Remarks:Up is price of common black box,if need flocking box,then add extra USD0.2/PC.FOB Shenzhen price, including all standard accessories with black box packing.Payment: TT,PayPal or Western Union, 30% deposit and full payment before shipping.Big quantity and more competitive price.More products information please visit our website.Any questions please feel free to contact us. Thank you.