Features: SA90 home audiophiles grade bilevel amplifier with tube technology provides highly quality auditory amplification. . Easy to carry and suitable for home use, demonstrating a true stereo sound experience.. Tube tone bile preamplifier, providing warm and soft tone, clear and delicate sound quality, open soundstages. Strong power output, suitable for driving all speakers, showing excellent Auditory performances. for Auditory fans, enthusiasts, professional musicians and other users with stringent requirements for sound quality. Specifications: Size:about 145x85x85mm/5.71x5.71x3.35in Standard： US/EU Component: Metal Voltages:24V Power:80W+80W Package Includes: 1Set Home Amplifier Board note: Due to the different monitors and light effect, the actual color the item might be slightly different from the color showed on the pictures. Please allow 1-2cm measuring difference due to manual measurement.