8bitdo SF30 Wireless Bluetooth Controller Dual Classic Joystick for Android Gamepad - PC Mac Linux RETROSPECTIVE DESIGN - original pushing button, same touch, same feeling; Classic cross button and four shoulder-button design. EXCLUSIVE X-TANDER DESIGN: Stand up your touch screen devices and play with ease. DUAL-MODE SUPPORT: Bluetooth keyboard and touch screen simulation; Support both Bluetooth and USB connection. WIDE COMPATIBILITY: compatible with Android and Windows devices. BATTERY LIFE: Built-in 480mAh li-on battery, support long time game playing. UPGRADABLE FIRMWARE for function expansion. PROMMABLE KEYS to easily setup combo key and turbo key.