Suitable for PS4 controller. New durable quality. Improves operational flexibility and enhances gaming experience. Function Setting: 1. Long press the SET button for 2 seconds; the X light flashes quickly. 2. Press M1 or M2 (press once to switch once); lights flash slowly in sequence (flashing sequence: X - O - - - R3 - L3 - - L2 - R1 - L1). 3. When the target button is flashing, press the SET button to complete setting. Clear Cache: Long press the SET button for 5 seconds; the LED changes from blinking to off. Memory Function: Insert the handle again to retain the last programming function. The factory default has no definition. Turbo Function: Press M1/M2 and Turbo simultaneously to enable continuous launch function. Repeat to cancel. Color: Black Material: ABS Size: 99.5 x 57 mm Package Contents: 1 x Rear Button Joystick for PS4 Controller Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause slight color differences between the image and the actual item. Measurement allowance: +/- 1-3 cm.