12V car amplifier audio subwoofer speaker wireless bluetooth amplifier board with remote control

1??Mode Switching: The input mode switch button can be used for USB. storage card mode and memory card radio. easily switching between "mode" and "line in mode". 2??Wireless Connection: Press enter to switch to USB or storage card indicator HT or turn on your phone’s Bluetooth. find Bluetooth "LDZS" and click to connect. 3??Card Mode: Insert a USB flash drive or storage card. and the amplifier can play automatically. The "Previous Song". "Next Song" and "Pause Playback" buttons are for easy control. 4??Radio Mode: Press input to switch to radio mode. then press the play button. the amplifier will automatically search and save the channel. 5??Perfect Configured: Support EQ sound effect. can switch a variety of sound effects. 20HZ?20KHZ frequency response. MP3 and Bluetooth format. can be controlled by remote control.Item Type: Car Amplifier Material: Aluminium alloy Input Voltage: 12V Output Power: 20W x 4 Frequency Response: 20HZ-20KHZ Harmonic Distortion: 1KHZ 0.055% 4W High Pitch Control: 10KHZ± 12db 220mv 47K Power On Control: 100HZ± 12db 220mv 47K Card Reader: Storage Card/USB Format: MP3. Bluetooth Remote Control Battery: 1 x CR1220 (not included)