Firmware version available for BMCU 370C 1. For A1/A1 Mini Version: 1.05 2. For P1 Version: 01.08.01 The highest version can only use the above two versions, if your version is above, pls DOWNGRADE it, then it can suit for the BMCU370C. Method for changing frmware version: Mobile app - Device - Top Right Corner - Three - Firmware Version - Update to historical version If you choose buy the product without printout, here is the STL File of printout for you download: 1. Pls check if there is any damage when you receive package. 2. Ensure the 3D printer is powered off before testing. 3. Ensure the length of each Teflon tube is 55-65cm. 4. Ensure the Teflon tube is securely inserted into the pneumatic connector and ams wire hub. 5. Check the tightness of handle screws. 6. The filaments should be put in drying box with wheels, ensure the filament can be pulled. Color: As Shown Material: PETG+Metal Material Package Contents: 1x multi-color box 370C Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.