Bespeco MIX 30: Compact portable 3-channel mono mixer with audio/video level controlled by rotating potentiometers. Mixer is equipped with 3 mono jack inputs with sensitivity of 300 mV and 1 mono jack output (4 Vpp), and 3 volume control knobs (one for each channel) plus 1 master control for output. Powered by 9 V battery (not included). Dimensions: 94 x 90 x 42 mm. Black colour.