<b>If you encounter any problems, please contact us via Amazon as soon as possible. We have professional technical after-sales personnel to solve your problems.</b><br> <b>TFT35 E3 V3.0 Product characters：</b> <br><br> 1）Use the light-emitting encoder, press the bright blue light, if not, it will not light, Full of technology； <br><br> 2）TFT touch screen mode：serial port screen RS232 port； <br><br> 3）2 sets of UART serial port extension ports are reserved for DIY use.<br><br> <b>SKR MINI E3 V2.0 Upgrade Features:</b><br><br> Carries highly modular open source firmware Marlin 2.0, which facilitates user DIY and secondary development;<br><br> Use MP1584EN power chip, support 12-24V power input, the maximum output current can reach 2.5A; <br><br> The hot bed MOS tube uses WSK220N04, low on-resistance, larger heat dissipation area, and reduce heat generation; <br><br> Onboard Sensorless homing function, which can be used by plugging in the jump cap; <br><br> Optimize the plate and frame to avoid the phenomenon of screw hole gap and screws hitting components; <br><br> Support BLtouch, filament detection, power-off resume, automatic shutdown, etc.; <br><br> Onboard EEPROM: AT24C32; Add parallel double Z-axis interface; <br><br> Increase the board layer to 4 layer board; And increase the heat dissipation area of the back driver and strengthen the heat dissipation capacity; <br><br> Increase the distance between the driving chip and the components to avoid the trouble caused by the heat sink; <br><br> The driver shares a physical UART port, which saves IO and enhances stability; <br><br> Two CNC fan interfaces; And 5V power supply with BLtouch, TFT and RGB interfaces is optional; <br><br> <b>Note: Please contact us when you need firmware information or a manual.</b>