Feature: 1. 【Ultra-Low Noise】: This mini audio mixer delivers the highest sound quality at all output levels, boasting ultra-low noise operability for outstanding audio performance. It's perfect for quick mixing of 4 line level signals without any complications. Even at the highest levels, this 4-channel mixer maintains the highest signal quality and integrity, making it an ideal choice for multi-keyboard rigs and recording. 2. 【4-Channel Stereo】: Our mixer audio is divided into two channels. The input and output connections must use the stereo version of the 1/4 inch TRS stereo audio cable male connector (1/4 inch male to male stereo audio cable, TRS cable is the key point), then press the switch key. It's designed to mix 4 mono signals into 1 mono signal output (1/4 inch TS male to male connector, used for input and output connections). Please note: TRS/TS cables are not included in the package. 3. 【Easy Switch Between Stereo/Mono】: This mixer allows for easy switching between stereo and mono. With a simple press of a switch key, you can change the audio output to suit your needs, providing flexibility and convenience for your audio setup. 4. 【DC 5V Power Supply】: Our digital mixer adopts the latest DC 5V power supply method, so it's no longer limited by the application scenario. It comes with an adapter, providing you with the convenience of using it anywhere, anytime. 5. 【Multi-Functional and Simple Control】: This mixer collects sounds from many different sources (guitar, bass, and keyboard) to a listening position for monitoring or routing. Each channel on the linear mixer has an independent volume control, independent input plug and volume control, and a single output for the amplifier. It mixes multiple channels into one track, making it suitable for your keyboard, small stage setup, drum kit, or sub-mixing. Specification: Input/Output Type: 6.35 mm stereo interface Power Adapter: US Plug, EU Plug (optional) Power Type: Type-C DC 5V Product Color: Black Product Material: Metal Product Size: 11 * 7.5 * 3.2cm/4.3 * 3 * 1.3inch Package List: 1 x Audio Mixer1 x Power Adapter1 x Power Cord