The Vivitar iSing Bluetooth Karaoke Machine is the perfect way to start any party. This bluetooth wireless speaker is a party in itself. The built-in microphone allows you to singalong to your favorite tunes while streaming and listening to music wirelessly through the speaker. The compact and portable design allows for ease of transporting and plays your tunes for up to 4 hours at a time!  Number of Batteries: 1 Features: Battery Operated, Portable, Bluetooth Compatible, Light-Up Battery Type: Lithium Ion Measurements: 4.45 Width/Inches, 5.75 Height/Inches, 4.45 Length/Inches Base Material: 70% Plastic, 30% Acrylonitrile Butadiene Styrene Country of Origin: Imported