Features: Professional for converting the phono signal to a line level signal. Ultra-compact phono preamp with metal shell, portable and durable. 2 * RCA(L & R) inputs, 2 * RCA(L & R) outputs, 1 * 1/4" TRS output, multiple connection choices. Designed with a push button switch and power indicator. With level and volume control knobs, easy to adjust. Ultra low-noise audio performance, offers excellent sound quality. Specifications: Plug Type: EU Plug / US Plug (Optional) Material: Metal Power Supply: DC 12V, 150mA Power Adapter: Input--100-240V, 50/60Hz, output--12V, 1A Item Size: 103 * 64 * 32mm / 4.06 * 2.60 * 1.26in Item Weight: 179g / 6.33oz Package Weight: 316g / 11.16oz Package Size: 14 * 9.8 * 8cm / 5.51 * 3.86 * 3.15in Input: Type: RCA connector Impedance: Approx. 47kW Max. Input Level: -23.5dBV@1kHz Output: Type: RCA and 1/4" TRS, stereo connector Impedance: Approx. 50W Max. Output Level: 11.5dBV@1kHz System: Frequency Response: RIAA THD: 0.06% typ.@-40dBu/1kHz Gain: 35dB Signal-to-noise Ratio: 68dBu@0dBu, A-weighted Input Sensitivity: 5.3mV@1kHz Packing List: 1 * Phono Preamp 1 * Power Adapter