The Aiwa Karaoke Speaker KBTUS-400 from Aiwa is a sound system with an LED light show for any occasion. At every party or large event, you can sing along using the two microphones. It can also connect to a variety of other devices such as PCs, smartphones, DVDs, VCDs, CDs, LDs, televisions, MP3 players, radios, E-pianos, and any devices with audio output through the audio input to play your favorite music. For example, a smartphone can be connected via Bluetooth, and USB or microSD media can be read with a maximum capacity of 32GB each. The FM radio also allows for music enjoyment, completing the sound machine. A 7000mAh battery provides 5-8 hours of playtime and takes 6-10 hours to charge. If that is not enough, the device can also be powered by an AC adapter. When the microphone priority is activated, the music volume is automatically reduced. A total output power of 600 watts maximum and 80 watts RMS is achieved through the 3-way speakers (12 inches) + 4 inches + 1 inch.