Take the fun to new levels with the carpool mic 2.0! Get louder than ever with the new voice changers and sound effects! And get ready to double up the fun with the capability to add a second microphone for endless duet fun! Whether on the road, on the boat, at home or anywhere, all you need is a speaker with an fm tuner or aux port to get the party going. Get ready to turn up the volume and turn some heads like never before! Number of Batteries: 1 Features: Bluetooth Compatible, Plug And Play Battery Type: Lithium Ion Measurements: 2.1 Width/Inches, 3.6 Length/Inches, 10.6 Height/Inches Base Material: 80% Plastic, 20% Metal Country of Origin: Imported