This versatile PA speaker with built in amplifier is ideal for venues where power is not always easily accessible as it can work off of its rechargeable battery or from mains power. Two VHF handheld wireless microphones are included with the receiver built into the mixer/amp section at the rear along with a further two wired mic inputs, auxiliary line input and integral USB/SD/FM media player with record function. A B/T receiver is also built into the media player to enable pairing with a smartphone or tablet for wireless audio playback. The retractable trolley handle and rear wheels make it easy to transport over short distances. As with all of our items, should you have a question, please get in touch via the message link and we shall be happy to share our first hand knowledge of this portable speaker.