JRGKJCP 4CH Bluetooth 5.0 Home Audio Amplifier Power,RMS 40Wx4 Digital Receiver Amplifier with Active Subwoofer, Sound Audio System w/AUX, Headphone Jack, USB, SD, Remote Control-Black.

4.0
Channel Subwoofer Amplifier: The BT-998 HiFi Bluetooth 5.0 Home Audio Amplifier with 40Wx4. 4.0 channel amplifier, This makes it the perfect addition to a home theater, audio PC setup and car audio system.
^^ Bluetooth 5.0 Input: The BT-998 is equipped with USB, SD/MMC, AUX and RCA inputs that play audio from MP3, cell phones, tablets, TVs and other external devices. Built-in Bluetooth 5.0 chip for quick connection to audio input devices such as smartphones, MP3, tablets, TV etc. Bluetooth 5.0 wireless connection saves wiring hassle and ensures excellent sound fidelity.
(Notice: the Bluetooth connection within 5m); ^^
Hi-Fi Sound: It has a high capacity transformer that gives you clear sound without any distortion. It has a harmonic distortion less than or equal to 0.05 % this helps you listen crystal clear and sharp music (NOTE: NOT surround stereo sound, perfect for listening to music) ^^
Multiple Connectivity: Latest Bluetooth 5.0 version that gives you a large operating range of 30ft. You can connect it with your music streaming devices like pc/mobile/laptop either with Bluetooth connection, 3.5 mm AUX Cable or Headphone Jack. It also supports USB Port, SD/TF
Card port (NOTE: Please keep the distance within 30ft / 10m between the device and amplifier without any wall blocking. But if you are connecting whith TV or PC devices, please keep the distance within 15ft / 5m) ^^
Easy To Use: 5.1 x 3.1 x 1.2 inch mini size, you can take it anywhere, and with the remote control makes it easier and convenient to operate to use. SD/TF card and USB plug-and-play.