Wi-Fi primarily uses two frequency bands, 2.4GHz and 5GHz. Because the 2.4GHz band is the default for most devices, only has three available clear channels, and is shared by Bluetooth, remote controls, and microwave ovens, the 2.4GHz band can get very crowded and speeds can become very low. In order to achieved Wireless stereo sound system, 5GHz is used in our device to prevent all the interuption.