NEJE DK-BL 3000mW Laser Engraver 450nm Smart AI Mini Engraving Machine Wireless BT Print Engraver BT 4.0 for iOS/Android Connection This mini laser engraving machine with high precision and high stability is an amazing gift for DIY fans. It supports both wireless BT and USB cable connection, much practical than normal engraving machine. Features: This desktop laser engraving machine features high speed, high precision and high stability. Innovative technology applied in this newly introduced engraver, it supports both wireless BT and USB cable connection. BT 4.0, wireless data communication, advanced APP for engraving control, DIY engraving anytime and anywhere just through a smart phone or a tablet. Also support USB connection with PC, specialized software helps to edit picture and monitor the engraving process. This software provides 6 language selection. Comes with a laser focus knob, through rotation it can adjust the focus point to determine the precision. Perfect for Decoration Engraving or Customize your small lovely belongings. Self-developed power IC and radiator, carving time will last much longer than other laser and more stable. It is perfect for batch operation of logo engraving which makes the engraver more practical. You only need to prestore a picture and send the picture to the engraver. Built-in 6000mAh lithium battery provides 4A output, can be used without cable connecting with any power. Acrylic body and fine workmanship show excellence in quality. Easy e and install, great gift for DIY enthusiasts. Application: Depth Engraving, Wood Marking. Engraving material: wood, gray paper card, non-transparent plastic, leather, paint pcba, etc.( flat, opaque and can be burned black) Activation: In order to ensure that the machine is powered off during transportation, the factory will sleep the machine in advance. The first time you use it, you need to connect the usb cable to activate the machine. Specifications: Material: Acrylic + Aluminum + Stainless Steel Power: 3000mW BT Version: BT 4.0 BT Distance: Within 10m Supporting OS: Support Android Phone 4.0 above, BT 4.0, support to compatible with iOS 11.3.1 above, BT 4.0, support WIN XP SP3, WIN7, WIN8, WIN10,  iOS X 10.10 or higher, 64-bit Battery: 6000mAh Lithium Battery Battery Type: Polymer li-ion battery Battery Working Time: About 3 hours DPI: 350dpi Laser Wavelength: 450nm Engraving Space: Approx. 10 * 9 * 5cm Temperature: 500°C Supported Image Formats: JPEG, BMP (24 bit only), TIFF, PNG (32 bit or less ), PCX (8 bit and 24 bit RLE ), PCD Image Size: 550 * 550 pixels Engrave Mode: Bitmap carving Input: One USB(5V 0.5A or 1A) Laser Can Be Replaced: YES Every Work Time: < 1 hour Item Size: Approx. 20 * 16 * 14.8cm / 7.87 * 6.30 * 5.83in Item Weight: Approx. 1252g / 44.16oz Package Size: Approx. 30 * 22 * 21cm / 11.81 * 8.66 * 8.27in Package Weight: Approx. 1760g / 62.13oz Package List: 1 * Engraving Machine 1 * Protective Board 1 * USB Cables 1 * Allen Wrench 1 * Focusing Film 1 * User Manual NOTE: 1. It can not engrave metal, acrylic and any other retardant material. white material doesn't work well. 2. The product is powered by polymer lithium battery of 6000 mah. The yellow light flashing once or twice means the power is low, which needs to be connected with 5v power supply. 3.The product is only suitable for personal diy, because of the speed of carving, it is not recommended for industrial use. 4.When the machine is working, it is recommended not to look directly at the laser head, and not to operate the laser head directly by hand. 5.Laser diode is a sensitive component, pay attention to prevent electrostatic damage (product includes electrostatic conservation design, but there is a certain probability of damage). 6.This model is not suitable for carving portraits, but only for carving line images(This is due to the 450nm wavelength characteristics). 7. If the power is below 10, the machine will stop working. Please check whether the power is sufficient before use.