The speaker gives out 100 Watts of peak power, so it wouldn't be a good choice for a mobile disco. However, it will keep you company on a long journey, and it is great for providing music on a beach, or by the pool. It has a USB port into which you can plug a memory stick, and there is an SD slot to take a memory card. There is also a 1/8-inch AUX socket, by which you can connect the speaker outlet of your MP3 player or iPod, so you are not limited to the radio as a source of music. There is one other benefit of this speaker it has Bluetooth capabilities. That means you can play the music you have stored on your smartphone, or any other Bluetooth-enabled device, through the speaker. Even if you can't get a signal for calls from your cell, you will be able to set up communication between the speaker and your phone without a cable as long as the two are within 30 feet of each other. The unit comes with a shoulder strap to make it easy to carry. You also get a headset microphone, which makes the speaker ideal as a hands-free PA system. You are totally mobile with this package, so it would be an ideal tool for a tour guide to communicating with a tour group. This unit has "good times" written all over it. Features 100 watts peak power Built-in battery offers 5 hours of continual music playing or 7 hours with live microphone playback great for tour guide or outdoor mobile PA events Woofer: 3" woofer Inputs: Bluetooth, USB, SD card, FM, 1/8" AUX Headset Microphone(Included) uses 1/8" input Volume Plackback Controls Rechargeable Battery and back up 4x AA Batteries Torch LED Light with Individual Power Switch LED Display readout shows battery, playback time and radio station Built in Recording with integrated Microphone Shoulder Strap Retractable Antenta for better reception Bluetooth compatibility allows for wireless connection to any A2DP stereo Bluetooth device Bluetooth Range: 30 Feet USB flash/SD Card drive input accepts drives up to a maximum of 64GB and will playback .mp3 and wav files Dimensions (L x W x H):10.5"x6.2"x14.5"