The for screen kit, the second generation upgrade version, has made the following upgrades on the basis of the first generation, and also perfectly supports the firmware and Havoc firmware, which can be seamlessly upgraded.For a generation of 2.8-inch screen upgrade to 3.2-inch wide-angle screen, and perfectly supports touch. You need to know that the version made with the materials and going to the logo is only 2.4 inches. Increase the maximum 3W speaker power amplifier, and achieve switching with headphones.You can equip the speakers you need to achieve the external function.Pure hardware implementation does not affect subsequent firmware upgrades. The version cannot support speaker placement.Upgrade the battery socket, and standard equipped with a more suitable battery, the size is perfectly placed in the for .Also supports usb charging and charging status LED display. And support the key switch machine, which is the key to offline use. The version can only be used when plugged in.It is not possible to switch the machine to upgrade the crystal to a DIP14 full metal shell high-precision active crystal, with stronger anti-interference! Combined with the key feel problem of the first generation feedback, the key is upgraded to a better feel button, and equipped with a key cap, it is easier to match your own designed shell.Of course, the first generation of illuminated knobs have also been upgraded to black, which more closely matches black PCBs.Colour:blackMaterial:aluminum alloyPackage Contents:1 x LCD Display Touch Screen SetOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.