Bluetooth version: bluetooth 4.0 and above. APP operating system: support IOS 9.0+/Android 5.0+. Power input: type-c(5V, 2A) charger.Operating humidity range: 5%80% (non-condensation dew). Safety certification: iec60825-1 (laser level 1 safety specification), CE, RoHS, FCC, FDA CDRH registration. Materials that cannot be carved: metal, stone, jewelry, reflective materials, silver, white paper (astigmatism, poor effect), materials that cannot be burned or focused, such as metal without any coating, transparent plastic, with added flame retardant materials. Distance between the laser head and the carved object: about 20cm. Immediately you paid for the order. Communication always is best way to solve problem. We accept any return in 30 days that we promise. Please never return the parcel without agreement. From us, it is no possible for us to get the parcel. We at strive to give all of our customers a 5 star service.
As this helps us maintain a quality service. Communication is very important, we believe we can resolve all the problem with you. It's our pleasure to answer any questions you have. This item is in the category "Business, Office & Industrial\Printing & Graphic Arts\Sign-Making". The seller is "miaomore88" and is located in this country: CN.This item can be shipped worldwide.