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Description: 500mw Bluish Violet Laser Head Parts 405nm For DIY Engraving Machine Specification: Input voltage: 4.5-5V Color: blue-violet light Power: 500mw Wave length: 405nm Features: 1.Can be carved items included: 2.Hard wood, plastic, bamboo, rubber, leather, cut paper and so on. 3.Can NOT engrave Metal/Aluminum/Acrylic and any Retardant Material Package include: 1x Laser head Note: This laser module is used for the NEJE machine. If not, the power be will less than 500mW. Please make sure you do not mind before you bid. Thank you.