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• ParametersLaser head size: 69mmx30mmx30mmCircuit Board size: 71: 405nmOutput power: 400mWWorkind current:<450mALaser shape:DOTFocusable:YESCooling method:Fan coolingModulation frequency: TTL modulationWorking:Long time workingFinish Color: Aluminum BlueCase Material: AluminumThe circuits control: constant currentReverse polarity protection: with mechanically identify the high quality and negativeOperating voltage: DC = 12VWarm-up time: NoneOperating Temperature: -10 ℃ ~ +40 ℃Storage temperature: -10 ℃ ~ +40 ℃ Features1. This laser module can paintings for decades with cooling fan please you'll want to preserve the laser operating under 30℃. Please upload a 12VDC energy to this laser module. Red twine connects”+” pole; Black twine connects ”-” pole. If you don&;t use TTL, please simply go away the blue and white wire. This is a focusable laser module. Please do not take off the lens adjustable part off to avoid dust. Please put on 405nm laser defense goggles to guard your eyes when engaged on this module. Package1pc 12V 405nm 400mW Violet Blue Laser Dot Module W/ TTL Fan Cooling Stage Lights

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