Using your VocoPro 15 - Inch Karaoke Thunder - 1500 speaker is easy. First, choose your power source. You can use the battery for portability, or plug it into a 110V wall outlet or a 12V DC car adapter. Connect your microphone or guitar to the appropriate inputs to start singing or playing. For audio playback, use Bluetooth to connect your phone or other devices, or insert a USB, SD, or TF card. You can also tune in to FM radio. When using the speaker, avoid exposing it to extreme temperatures or moisture. Keep the speaker clean by gently wiping it with a dry cloth. If the battery is used, recharge it when it runs low. Also, when using the professional DJ lights, make sure they are properly set up to avoid any damage.