1. This product is a double back clip button specially used with the handle for , so that the handle for is upgraded, which greatly improves the pleasure of playing games. 2. Support Turbo burst function, support Turbo burst three-speed burst speed setting, free your hands and make easier. 3. Support L1/L2/R1//Up, down, left and right keys/X/ keys in the handle. A total of 12 function keys support the mapping function. Product adaptation: BDM-010 first generation / 020 second generation handle for Mapping function: The mapping function can set the L1/L2/R1//Up, down, left and right keys/X/ keys in the handle, a total of 12 function keys. 1. Short press the mapping button, the light bar is always on in orange, which means that the button mapping function can be set. 2. Press and hold one of the back clip buttons and any function key of the handle for 1S at the same time, the light bar flashes orange for 3 times and turns steady on, indicating that the back clip key mapping setting is successful. 3. After the setting is completed, short press the mapping button again, the orange light bar will turn off, and exit the mapping function setting. At this time, you can use the back clip button to play normally. Colour:black Material:plastic Package Contents: 1 x Double Back Clip Button for Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.