Mini passive stereo mixer is a stereo 8-way passive mixer for extended equipment interface tone tuning, mixing instrument, player, tape player, computer, mobile phone, tablet and so on. No battery or other power source required, direct plug-in. Compact design and solid metal shell. Features: A stereo 8-way passive mixer: 8 groups of stereo mix input with adjustment, 2 groups of stereo selection switch output (choose one from 2 groups). For extended equipment interface tone tuning, mixing instrument, player, tape player, computer, mobile phone, tablet, etc. The output gain is -12dB after mixing, it needs to be connected to amplifier, preamplifier, mixer or active speaker. Using standard RCA interface. No battery or other power source required, plug and play, more convenient to use. Compact design and solid metal shell. Compatible with all types of playback equipment and external active speakers. Suitable for DJ, , bar, party or more. Note: Size and color may be slightly different because of manual measurement and different light conditions. Thanks for understanding. Specifications: Color: Black Material: Metal Interface: RCA Power Supply: No need external power supply, plug and play Input Impedance: 10K ohms to 47K ohms Output Impedance: 2.5K ohms to 10K ohms Output Gain: -12dB (connect to power amplifier, preamplifier, mixer or active speaker after sound mixed) Item Size: 172 * 68 * 38mm / 6.77 * 2.68 * 1.50in Item Weight: 420g / 14.82oz Package Size: 21.5 * 15.5 * 6.7cm / 8.46 * 6.10 * 2.64in Package Weight: 520g / 18.34in Package List: 1 * Audio Mixer