Can be used home, garden, caravan, camper, marine. Low power consumption, super hydrostatic bring extreme atomization enjoyment. Excellent quality, strong stability,but low noise.This amplifier adopts 6J5 electronic tube and fine-quality NE5532, and BT4.2 version do not support APTX function. The main filter capacitor adopts 470UF/25V, and the coupling capacitor adopts 1UF capacitor. The PCB adopts 1.6mm thickness double-sided sheet, 2.0ounce copper thickness, and the whole process of tin-spraying ensures the fine passing performance of the current.Features:Using 6J5 electronic tube and fine-quality NE5532, and BT4.2 version do not support APTX function.The main filter capacitor adopts 470UF/25V, and the coupling capacitor adopts 1UF capacitor.The resistor uses a high precise chip resistor, and first-class printed circuit board quality.The printed circuit board adopts 1.6mm thickness double-sided sheet, 2.0ounce copper thickness, and the whole process of tin-spraying ensures the fine passing performance of the current.The layout of board is reasonable, beautiful, and with small current noise.The input and output interface are made of gold-plated RCA lotus pedestal, which is long lasting and beautiful.Three knobs design improves everything detail, transparency, immediacy, richness, tone associated with your music, you can get both powerful or sweet sound easily.Specifications:Name: PreampMaterial: printed circuit boardColor: black, silver (optional)Power supplys: DC12VItem size: 137 * 104 * 41mm / 5.39 * 4.09 * 1.61inPackage size: 250 * 200 * 70mm / 9.84 * 7.87 * 2.76inPackage weight: 500g / 1.10lbPacking List:1 * Preamp