Features: Uses Analog circuit design for tube enhancing effect. Using high quality stuffs such as German WIMA audio capacitance, high precision resistance for signal transaction. Entirely dust-proof rheostat, for long using life. True bypass design. Bright LED Stainless metal panel and metal enclosure, luxury and durable. Connectors:Input×1,Output×1,DC9V in×1 Power supply:9Volt battery not included or DC9V adaptor Current:12mA Input Impedance:1M |