GOOD MATERIAL: Made of aluminum alloy, corrosion resistant, high strength, sturdy and durable. MULTIPLE AUDIO FORMATS: Powerful, stable and reliable, high chip integration, support MP3, WAV, WMA, APE and other audio formats. MULTIPLE INPUT: Bluetooth, USB, digital-to-analog conversion and streaming to normal speakers for playback, improved use of normal speakers. REMOTE SWITCH: You can use the remote control to play or pause, change the previous and next song.