This is a 12-24V DC single power supply, high-performance digital power amplifier chip as the core, left and right channel stereo power amplifier output. Can support 50W (left channel) + 50W (right channel) stereo channel output, support Bluetooth 5.0, two external audio input interfaces, with preamplifier, bass sound processing; bass frequency, total volume, 2 adjustment potentiometers. Bluetooth uses Bluetooth 5.0 protocol high-quality Bluetooth chip. Two AUX inputs can be at will. Host function: Switch button (center button of total volume potentiometer): Long press this button to turn on. The -50 is powered on and is in the Bluetooth state. After the Bluetooth connection is successful, double-click the center button for song, and long press for the previous song. Mode selection: Short press the center button to switch to AUX state when in Bluetooth search, long press the center button when in AUX state, and CY50 is in standby state, short press again to turn it on. Indicator light Status indicator: In Bluetooth mode: flashes quickly when Bluetooth is searching, flashes slowly when Bluetooth is connected, AUX status: indicator is always on. The volume of the power-on module is the largest by default, the internal EQ is the default EQ, the volume is controlled by the potentiometer, and the low-frequency potentiometer can adjust the low-frequency sound effect. The prompt tone is broadcast in English (such as: Bluetooth mode and other voices), and the default prompt tone size is 60% of the total volume. Speaker: 4 ohm-8 ohm speakers can be connected, 12V power supply is up to 18W*2, 24V power supply is up to 50W*2 Colour: yellow Material: plastic Package Contents: 1 x Amplifier Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.