This is the only karaoke machine equipped with Auto-Tune—the same software used by industry professionals to correct a singer’s pitch and enhance his or her overall performance. It connects to a smartphone or tablet via Bluetooth to display lyrics on your device and stream music from a free app or an online library (additional charges may apply). The karaoke machine has over 1,000 vocal effects that can alter your voice to fit a certain genre, enabling you to sing with a country twang or sound like an 80's pop artist. The speaker’s 8" woofer and 3" tweeter provide superior audio that activates integrated lights that illuminate to the beat of the music. With two microphone jacks (two microphones included). Includes remote control and an 8 GB USB drive for storing recordings. Charges via AC; a full charge provides up to 25 hours of power. 16 3/4" L x 14" W x 9 1/2" H. (19 3/4 lbs.)