AmazonBasics VX3781 is a wireless PA speaker and party speaker, which can also be used as a microphone with a built in bass boost. The device has multiple input sources, such as USB, Line-in or Bluetooth. It also has multiple preset EQ modes, a radio tuner, ability to connect to another identical speaker and a built-in battery with a charging time of 4 hours for up to 8 hours of playtime, so you can enjoy your favorite music anywhere you go.