This is NOT an easy job for someone who has no technical skills with Disassembling or Assembling Cellphones/mobile phones So only purchase this item if you know how to install it. Support 7/7P/8/8P any model, no need to change the tail plug, no need to disassemble the motherboard, uA level power consumption, 24 hours power consumption is less than 1%. Raw materials, original factory production, in addition to no fingerprints, all functions are perfect, headphones and other functions are normal, perfect replacement of the original fingerprint cable, easy to install, easy to operate! Support 10 systems, 11 systems, 12 systems and later systems. Universal return key installation steps: 1: Remove the screen, short the two test points on the motherboard, do not remove the motherboard. Short-circuit cable is included for easy operation. 2: Remove the original fingerprint button and replace the universal return button. (Original material, original installation method) 3: The first time you need to set up your phone, you can do it in one step.