1.UCD700 power amplifier board, UCD fully discrete component power amplifier board with small size and high power, frequency response of 10-35KHz, dual power supply +/-35 - 85V, (maximum voltage cannot exceed 92V) +/- 15V, 12V (VDR12V) rated output power of 4ohms 700W, 8ohms 380W. 2.The full board crystal is with equipment and has a wide range of applications. It can be used as ultra-low frequency and ultra-high frequency amplifier with a width of 35KHz, which is beyond the reach of traditional AB class and digital power amplifiers. 3.The sound quality is sweet, soft, and the high notes are crisp and not harsh. The overall sound quality is realistic and coordinated, and the scene reproduction is extremely high. 4.It is a HIFI digital amplifier after Class A and Class AB. It has both sound quality that can compete with AB class and remain unbeatable, as well as high efficiency that cannot be compared to AB class, bidding farewell to bulkiness. 5.Comes with short-circuit protection and overcurrent protection. Note:Installation guide not included, we strongly recommend you professional installation. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color: As Shown Material: plastic Package Contents: 1 x Amplifier Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.