Warm up your vocals, grab your favorite singing partner, and hit play on your favorite karaoke playlist! The Mercury Duet Karaoke Microphones and Bluetooth Speaker let you and a partner sing the night away to all your favorite karaoke hits. The Bluetooth speaker means that you can sing along to all your favorite hits, just connect your own device and hit play! Includes two wireless microphones with adjustable settings. Bluetooth connectivity allows wireless speaker to connect to any Bluetooth enabled phone or tablet. Batteries and Micro-USB Charging Cable Included Included : BT Speaker x1 Microphone x2 18650 Battery pack x1 18650 Battery x 2 User Manual x1 Micro USB Charging Cable x1  # Pieces In Set: 3 Number of Batteries: 1 Battery Type: Lithium Ion Measurements: 9 Height/Inches, 7 Width/Inches, 11 Depth/Inches Base Material: 75% Plastic, 20% Metal, 5% Other 5% Or Less Country of Origin: Imported