Audio Amplifier 5.0 Bluetooth 2000W HiFi 326BT AV Amp Speaker with Remote Control 2 Channel

Specifications: 

Signal input sensitivity: 200mv (± 30mv)
Total harmonic distortion: ≤ 0.5%
interface1: USB Disk
interface2: Max 64GB SD Card
interface3: 4 way microphone input
display: LED
function 1: Reverberation
function 2: fine tuning
function 3: balance