Bluetooth playback and MP3 playback: This karaoke machine connects to any smart device in seconds via the built-in Bluetooth and Aux inputs. Built-in battery and 5-watt speaker: This karaoke device features a built-in rechargeable battery that allows you to play music for up to four hours through the 5-watt speaker, providing you with a truly wireless karaoke experience. Two karaoke microphones: With two karaoke microphones, this karaoke package is ideal for duets. LED lights: They move in sync with the music; the built-in light show in this karaoke machine can be turned on and off depending on usage. Karaoke party: Connect this as a speaker to your smart TV via Bluetooth and use this karaoke machine to host a traditional karaoke party. Use streaming services to sing along with lyrics displayed on your TV.