Replaceable lens design: Yes, Added window protection lens to extend service life (high temperature resistance of 1000 degrees Celsius) 04x0.06mm Focus method: adjustable ( Recommend 30-55mm ) Optical power: Pulse 12W+, CW 11W+, Use 80% power (9W+) when cutting for a long time.

Neje A40640 SPECIFICATION Module: NEJE A40640 Focus. Attention:Before opening the app, please start the machine's power and. Attention:The phone settings just make sure that the phone's Bluetooth function is turned on and that the connection to the machine is in the app interface. Step2: Turn on Bluetooth in the phone settings.

Step 2: Install the driverStep1: Scan QR code or click install the app by your iphone or itouch. See the info I quoted from the NEJE website below. The software might heve been forked to work for the old NEJE DK-8-KZ with firmware prior to that date and with the new updated NEJE DK-8-KZ that came out after 2017.5.27.

Maybe that is what is causing the trouble and different results in getting the hardware to work.

Lightburn key