[ Stereo Audio Mixer ] 4-Channel Audio Mixer can mix 4 stereo audio signals from instruments, CD players, tape players, computers, mobile phones, and tablets to speaker and headphone outputs. [ Input and Output ] Features 4-channel (L&R) input and 1-channel (L&R) output for convenient 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, ensuring excellent audio performance. Specifications: Input impedance: 10K ohms to 47K ohms Output impedance: 2.5K ohms to 10K ohms Gain: -12dB MAX Net weight: 0.2 kg Dimensions: 85 mm x 52 mm x 40 mm Color: Black Material: Metal Package Contents: 1 x Stereo Audio Mixer Note: Other items not included. Due to lighting and display differences, actual product color may vary slightly. Measurement error allowance: +/- 1-3 cm.