Wi-Fi, (Black & White)4 Inch Wifi Touch Screen wall amplifier Control Panel TUYA APP( AUX Individual Volume Adjustment) , 480x480 resolution, android 11 system, 1+8G,4- core processor CORTEX A7@1.2Ghz, CS8618C amplifier chip, 2x30W@8ohm, WIFI6.0: Support 2.4G + 5G WIFI, Two way Bluetooth, Inernet Radio, TF, OTG-USB disk, Video player, Audio in, Audio out, Timer function, Door bell, Smart home control with RS485 port, RJ45 port, remote control. AC110-250V, with standard cover.