Features: Stereo 8-way passive mixer: supports 8-way stereo sound input and mixed output, achieving mixing processing of multiple sounds. Passive design: can use without the need for external power, convenient, saving energy, and easy to operate. 8-channel stereo mixer: Provide for easy connection to various sound devices. Small size design: small in size, convenient to carry and place, suitable for various occasion. Quality: The appearance is all metal housing, wear-resistant, corrosion-resistant. Specifications: Color: Black Size: about 172x68x38mm/6.77x2.68x1.5inch Input channel: Supports 8 set of stereo simultaneously mixed inputs Output channel: Supports 2 set of stereo selection outputs (cannot simultaneously, choose 1 from 2) Input impedance: 10K -47K Output impedance: 2.5K -10K Power: No need for external power, just direct insertion for use Package Includes: 1x 8-Way Passive Mixer note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.