CMX A4 In-Wall Wi-Fi Bluetooth Stereo Amplifier with 3.5" Touch Screen, USB/FM/SD, 4x30W Output, Remote Control, for Home/Office Audio Computer Peripherals Maintenance-Free Lead-Acid Battery: Reliable power

Maintenance-Free Lead-Acid Battery: Reliable power with no need for maintenance

With interface for fire alarm system

Huion HS64/HS610/HS611

reducing downtime and errors

Requires 3× AAA batteries for power (not included)

CMX A4 In-Wall Wi-Fi Bluetooth Stereo Amplifier with 3.5" Touch Screen, USB/FM/SD, 4x30W Output, Remote Control, for Home/Office Audio Computer Peripherals Maintenance-Free Lead-Acid Battery: Reliable powerA4 All in One In Wall Stereo Amplifier with Touch Screen Control The A4 is a compact in wall amplifier with integrated Bluetooth, FM radio, USB SD music player, and four channel stereo output. Designed for home and commercial audio zones, it delivers 4 x 25W power and supports up to 8 speakers. With a 3. 5 capacitive touch screen and remote control, the A4 is your complete solution for small room sound systems. Wireless Audio: Built in Bluetooth