Pyle Pro 1000-Watt Portable Wireless Bluetooth – Stereo Mixer Karaoke Amplifier System with Dual Mic / RCA Audio / Video Inputs, Speaker Output for Instant Home Karaoke, DJ Party – Pyle PMXAKB1000. Brand: Pyle Model: PMXAKB1000 Product Dimension: 18.5 x 15.5 x 7.5. MULTIPLE CONNECTIVITY: The device is equipped w/ 2 1/4 microphone input, 2 switchable RCA A/V inputs for source player DVD, CD, VCD, etc. , 3 RCA audio output (to recording device, amplifier, mixer) & 2 RCA video Input / Output (TV, monitor device). DIGITAL KEY CONTROLS: The Digital Key Controls enables you to lower or raise the key of the source music sound to fit the vocal range of the person to sing. You can also reset the key back to its original state. ROTARY CONTROLS: This has front panel rotary adjustable control center that allows you to control the volume, balance, and range of y.