Promotional Xoopar OctopusFly Audio Transmitter This wireless audio transmitter and charging cable is a must-have for music lovers on the go. With the TX function, you can easily transmit audio from sources like in-flight entertainment systems or fitness equipment to your earbuds or headphones, without the hassle of wires. The RX function allows you to turn any wired speaker into a wireless one, giving you the flexibility to enjoy your music wherever you are. Thanks to the built-in battery, which offers up to 8 hours of playtime, you can enjoy uninterrupted audio all day long. The dual adapters for both input and output ensure compatibility with a wide range of devices. This versatile and innovative device, made from recycled material, is the perfect tool for all your audio needs.