Play your favorite songs from different music sources - then drop the vocals to take the lead! Connect via Bluetooth, MicroSD card, FM Radio, or the audio jack. Voice-Changing Effects: Echo, Harmony, High or Low Voice, Robotic. Vocal Warm-Up Activities. 2 Microphones Included. AC Adapter and 6 "AA" Batteries Included. For Ages 14+. Size: 12.05 W x 6.30 L x 8.19 H Inches; Weight: 4.23 lbs.