Feature: 1. Easy Switching: When you have multiple audio devices that need to share audio or power amplifiers, you can connect multiple devices at the same time and use the output from them, which is convenient and practical without switching. 2. 1 In and 4 Out: 1 RCA stereo input and 4 RCA stereo output interfaces are more than enough to satisfy your various working needs. 3. Reliable Works: Multiple audio sources can be connected at the same time without affecting each other, and can be mixed or output separately. 4. Power Supply: DC 12V power supply, preferably linear power supply, switching power supply is easy to generate buzz. 5. Power Off Memory: Power off memory function will the last state after power on, largely simplify the operation. Specification: Item Type: Audio Switch Material: ABS Input: DC 12V Remote Control Power Supply: 1 x CR2025 3V 150MAH button battery, shipped with built in battery. . Package List: 1 x Audio Switch1 x Remote Control