ZK-AS21 Compact 2.1Channel TPA3255 BT Digital Power Amplifier Board Module High And Low Tone Subwoofer Power Amplifier Board 220W*2+350W

1.BT 5.1 version, with an effective distance of about 10 meters, PlugAndPlay, quick connection. 2.Can be easily connect to your mobilephone, computer, TV, speaker, etc. 3.Six lownoise preamplifiers enhance sound quality and volume, with high gain and a gain parameter of 30dB. 4.Clearly distinguish the power input terminal from the speaker wiring terminal to avoids connecting the speaker to the power terminal and burning the speaker. 5.Protections: AntiReverse connection, undervoltage protections, overheating protections, overcurrent and shortcircuit protections (can automatically recover, no need to restart). 6.Four audio input ways: BT, AUX, U Disk and USB sound card.