Woot offers RockJam 10 Watt Rechargeable Bluetooth Karaoke Machine with Two Mics for $16.99 (orig. $39.99) + free shipping with Prime.

Product Description:
Elevate your party experience with the RockJam Karaoke Party Speaker with Bluetooth (RJPS150). This versatile mini karaoke machine is perfect for both adults and kids, offering a powerful 8W output and a built-in rechargeable battery for hours of entertainment. With full Bluetooth connectivity, auxiliary input, and USB playback, you can easily stream your favorite songs. The integrated disco lights sync with the music, creating a vibrant atmosphere, while the built-in smartphone holder allows for seamless lyric display. Complete with two microphones and voice changer effects, this karaoke machine promises endless fun for everyone. These features make the RockJam Karaoke Party Speaker a must-have for any gathering, combining portability, power, and fun in a single package.

• Versatile Karaoke System: Perfect for both adults and kids, this karaoke machine doubles as a Bluetooth speaker and PA system, offering endless entertainment options.
• Portable and Powerful: With an 10W output and built-in rechargeable battery, this portable karaoke machine ensures you can take the party anywhere.
• Dynamic Light Display: The built-in disco lights sync with the music, creating a fun and lively atmosphere for any event.
• Complete Karaoke Set: Includes two microphones with 2-meter cables, voice changer effects, and volume and echo controls, providing everything you need for a fantastic karaoke experience.
• Seamless Connectivity: Full Bluetooth compatibility, auxiliary input, and USB playback make it easy to connect your devices and play your favorite songs.