Bluetooth Wall Amplifier 4 Channels Volume Control Wall Plate USB/AUX(35mm) Inputs Connect 4 Speakers With 12V3A Power Herdio 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 About this item Easy to install: Install the wall amplifier system on any wall in the home or office to unlock versatile sound configuration that is easily accessible. 16BT-4CH offers flexibility, power, and control all in one small and discrete package Compatible with Bluetooth: Built-in Technology allows you to stream audio wirelessly to a connected speaker system; Countroller receivers&Directs wireless audio works with all of your favorite device. Wireless range:30' Feet(10 Meters). Connecting Audio: Line level audio is typically supplied via the front 3.5mm input jack pigtail leads located on the rear of the amplifier receiver wall plate. Updated features: Microphone paging and speakers control made easy. USB port allow you easily access to music stored on a flash drive. Aux input port plug&play smartphones and other music device; Dual Independent 4 Channels: connect up to 4 speakers. What is in the package:1x in-wall audio receiver wall plate,1XAC adapter,2Xscrews. Note: make sure The unit is properly connected to external speakers;make sure the unit is properly connected to a power source. Technical Specs: Mic Input Type: Dynamic Power Amp Type: Stereo Class-D Minimum Load Resistance: 4 Ohm Power Draw: 12V 3Amps Built-in Design: Stereo amplifier comes with built in technology which enables connection to any intercom or speaker system , Compatible with all of today's latest smart devices(iPhones, iPads, iOS & Androids smartphones tablets, PC, Laptops, Desktops, etc.) and a wireless range of 30+ feet. Network Name: Herdio(No password required) USB PORT: The audio controller features USB flash memory reader for media playback which also doubles as charging port for your devices.It can also be used for phone charging. LED Indicator Lights: LED indicator shows the connection status. Upon pairing,the LED indicator light will blink progressively quicker until the unit successfully pairs with a compatible device.When a successful connection is established,the indicator light will shine solid and indicating that the unit is ready to transmit audio. EASY to install: Install the wall amplifier system on any wall in the home or office to unlock versatile sound configuration that is easily accessible. Note minor fitting adjustments may be necessary for mounting the wall plate amplifier receiver in certain wall installation applications