Scheda Amplificatore Audio Bluetooth 5.1, ZKAS21 2.1 CH 220W x 2 + 350W HiFi Subwo...
The wiring around the chip is an window tin spraying design to increase the output power. 【Multiple Audio Input Modes】 This Mini amplifier receiver built-in Bluetooth 5.1, USB flash disk, USB sound card and 3.5mm AUX Input.