1. Programming function settings: Press and hold the SET key for 2 seconds, the corresponding LED will flash quickly (4Hz), then short press the M1 or M2 key. The LED lights will flash slowly on the corresponding function screen in sequence (in the order X, ○, △, □, R3, L3, R2, L2, R1, L1). Then press the SET key once, and the corresponding functions will be mapped to M1/M2. 2. For example, when entering programming mode, press the M1 key to display the LED on R1, then press the SET key again; the LED on R1 will become permanently lit, and the M1 function will be set to R1. Programming M2 follows the same procedure. The 10 LEDs serve as button function indicators, showing the programmed functions and displaying two LED lights. 3. Cancel function: Press and hold the SET button for 5 seconds; the programming indicator LED will change from fast flashing to off, and the M1/M2 functions will be cleared. At this point, the buttons will have no programmed function. 4. Programming key memory function: Insert the back key extender into the handle. If M1/M2 has no function, LED1 will flash slowly (2Hz) for 3 seconds and then turn off. Long press the SET key to enter programming mode, and LED1 will flash quickly. If M1/M2 retains the last programmed function, the corresponding LED will remain on. 5. Programming function before power-off is saved to memory; inserting the handle again will retain the previous programming function. The device has no programming function by default at the factory. Type: for PS4 Strike Pack Controller Turbo function setting: Press and hold both the function button and Turbo button simultaneously to enable the Turbo burst function on that button. Press the same combination again to disable the Turbo function. If Turbo is enabled, the corresponding LED will flash rapidly (4Hz) when the button is pressed. Due to different batches, the appearance may vary slightly.