Allinone media control compatible with USB drives, TF (microSD) cards and Bluetooth devices. Provides convenient playback management from a single unit. Button controls and behavior: /+ button Long press to increase the volume continuously. Short press (in USB/TF/Bluetooth mode) to skip to the next track or station. PLAY/PAU button Short press to play or pause. Long press to switch between USB, TF, and Bluetooth input modes. PREV/ button Long press to decrease the volume continuously. Short press (in USB/TF/Bluetooth mode) to go to the previous track or station. Clear benefits Reduces the need to handle multiple devices by providing direct control for USB, TF, and Bluetooth sources. Quick, intuitive operation with three physical buttons for essential actions: play/pause, track navigation, and volume control. Longpress mode switching simplifies source changes without navigating menus. Compatibility and performance Works with USB drives, TF/microSD cards, and Bluetoothconnected devices. Responsive button actions deliver immediate playback and volume adjustments. Size and build Compact form factor designed for easy placement on car dashboards, desks, or portable speakers. Durable control surface intended for frequent use in everyday settings. Practical use scenarios Incar audio system: connect via USB, TF, or Bluetooth; use the buttons to control volume, skip tracks, and switch sources without taking eyes off the road. Home or office Bluetooth speaker: pair with a phone or computer; use USB/TF inputs for stored music and manage playback with simple button presses. Portable workspace setup: attach to a small speaker or desk setup; adjust volume and navigate tracks during work or study sessions.