3. Safe your speaker in position with packing material. You need to use packing peanuts, bubble wrap, or other smooth materials to protected your speaker in position. This will assist to prevent it from moving around during the flight and detrimental other objects in your bag. The Ultimate Ears https://www.bluetoothspeaker.top/subwoof-large-volume-wireless-stereo-music-player-bluetooth-speaker-wireless-bluetooth-speaker/