A compact 4 channel stereo mixer with 2 volume controls on each channel, and 2 master volume controls on the output. Features include four-channel mixing, two volume controls per channel, two master controls, and mono/stereo selectable output. It can be powered by battery or PSU. Product Dimensions (mm): 70x100x110. Net weight (kg): 0.5. Battery Type: PP3. Colour: Dark gray. Inputs: 6.35mm Jack. Outputs: 6.35mm Jack. Power Input: 9 V DC. Power Supply Included: No. Weight (kg): 0.49.