Simply connect the USB-A end to the "External Storage" USB port of the ATOTO device and the HDMI end to your gaming console or TV box

which can produce pure monochromatic red

P9 or any other car stereos

Wired & Wireless phone link TrackHU GPS Tracking APP ✓ × × ✓ ✓ ✓ Network Connection ✓ × × ✓ ✓ ✓ Built-in Preamplifier Built-in Digital Signal Processor Max 4*45W Amplifier with RMS 4*24W Built-in Max 4*45W Amplifier with RMS 4*24W Built-in Max 4*45W Amplifier with RMS 4*24W Built-in Digital Signal Processor Max 4*45W Amplifier with RMS 4*24W Built-in Digital Signal Processor Max 4*45W Amplifier with RMS 4*24W Built-in Digital Signal Processor

Q:Why isn't the magic box working

ATOTO CI-VIALD13 Scrolling Advertising LED Signs, AI Voice Control, Programmable led sign，Bluetooth APP Control，13.7" x 4" BMW-Compatible Car Stereo Simply connect the USB-A end