[ Stereo Audio Mixer ] 4-Channel Audio Mixer that combines 4 stereo audio signals from instruments, CD players, tape players, computers, mobile phones, and tablets to speakers and headphones. [ RCA Input and Output ] Features 4-channel RCA (L&R) input and 1-channel RCA (L&R) output for easy connectivity. [ 4 Separate Volume Controls ] Each channel has an individual volume control, allowing customizable level adjustment. [ No External Power Required ] Operates without a power supply. Plug-and-play design with durable metal housing. [ Ultra Low Noise Performance ] Delivers clear sound quality even at maximum output levels for reliable audio performance. Specification: Input impedance: 10K ohms to 47K ohms Output impedance: 2.5K ohms to 10K ohms Gain: -12dB MAX Product net weight: 0.2 kg Product size: 85 mm x 52 mm x 40 mm Color: black Material: metal Size: 8.5 x 5.2 x 4 cm Package Contents: 1 x Stereo Audio Mixer Note: Light reflection and different displays may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.