The MCP-75 was designed to allow you to enjoy all the qualities of a professional speaker with all the benefits of a portable music box. USB input to connect any USB memory stick with thousands of songs Micro SD card slot to connect SD memory cards with your favorite music Auxiliary Input – Plug in your Smartphones, tablets or MP3 players and sing along Wired Microphone input port Professional karaoke Large 1.5" LCD Display indicates the current mode of the speaker as well as relevant track information 2 Wireless microphones included with independent volume control Easy mobility & safe carry Power supply adaptor so music will never stop Rechargeable battery for up to 10 hours of listening pleasure Tech Specs: Power Output: 45 Watts Frequency Response: 40Hz-22 KHz +/- 3dB Product Dimensions: 250 x 235 x 410 cm, 9.8 x 9.3 x 16.2 inches S/N Ratio: > 70dB +/- 3dB Primary Power Source: DC 12V 2.6mAh Alternate Power Source: AC 100-230V / 50-60Hz 35W Wireless MIC frequency: Mic A: 202.2, Mic B: 185.15 USB/SD input provides easy access to music files Volume bass and treble control Convenient 1.5” LED display Recording function allows you to recored and store directly onto flash drive Additional microphone input with separate volume control