Feature: Multi-Function Back Button for Controllers. Two programmable high-tactile back buttons allow for enhanced control and flexible movement during competitive gameplay. Up to 14 mappable keys: Supports up to 14 programmable functions (including X, Y, A, B, RB, RT, LB, R, L, and more), enabling customizable key mapping to help improve performance. Durable materials with comfortable grip: The programmable back button is constructed with metal alloy components for durability, providing a responsive feel and secure grip. 3.5mm headphone jack: Built-in 3.5mm audio port allows you to connect headphones directly for immersive sound. Note: The headphone jack on the back button may not be used simultaneously with the controller’s primary audio output. Plug and play, easy installation: Simple setup with no tools required. Installs easily without causing scratches or damage to the controller. Note: This accessory is designed for compatible controllers with an Android interface model. It does not support PC connection. Ergonomic design: Full-fit controller integration ensures the multi-function back buttons remain securely in place during use. Product name: Multi-Function Back Button Input voltage: 5V Package includes: 1 x Back clip button Material: Plastic Color: Black Note: Lighting conditions and monitor settings may cause slight variations in color appearance. Measurement tolerance: +/- 1-3 cm. Package Contents: 1 x Back Clip Button. All other items not included.