Bluetooth Wall Amplifier 4 Channels Volume Control Wall Plate USB/MIC/AUX(3.5mm) Inputs Connect 4 Speakers with 12V 3A Power Supply,HWA-16BT-4CH

EASY TO INSTALL: Versatile sound configurations are easily achieved by mounting the wall amplifier system on any wall in your home or office. The positive amplifier terminal is connected to the positive speaker cable, the negative amplifier terminal is connected to the negative speaker cable, and up to 2 pairs of speakers are connected. The 16BT-4CH combines flexibility, power and control in a compact, self-contained design.
Compatible with Bluetooth: Built-in technology allows you to stream audio wirelessly to a connected speaker system; the controller receives and directs wireless audio, and works with all of your favorite devices.
Wireless range: 30 feet (10 meters).
Connecting Audio: Line level audio is typically supplied via the front 3.5 mm input jack pigtail leads located on the rear of the amplifier receiver wall plate.
Updated features: Microphone paging and speaker control made easy. The USB port allows you easy access to music stored on a flash drive. Aux input port plug and play with smartphones and other music devices; Dual Independent 4
Channels: connect up to 4 speakers.
What is in the package: 1x in-wall audio receiver wall plate, 1x AC adapter, 2x screws.
Note: make sure the unit is properly connected to external speakers; make sure the unit is properly connected to a power source