This unit doesn't come with an external power supply. Ideal for those who have their own power source.

How to use: First, connect your audio source to the transmitter. Then, tune it to the desired frequency. It's easy to operate. Note: As this unit doesn't have an external power supply, make sure you use a suitable power source. Maintenance: Keep it in a dry and clean place. Avoid exposing it to extreme temperatures. Wipe it gently with a soft cloth if it gets dirty.