This item was recommended by Ippin Kan as a mixer with two high-quality MM phono equalizers. It's also recommended for those with a double-arm setup. Since there is no AC adapter, the operation has not been confirmed. It requires 9V, 500mA, so please use an iFi audio iPower or similar adapter at your own risk to improve sound quality. It worked fine when previously used, but as it is a junk item without an AC adapter and therefore no operational guarantee, please understand this before purchasing. Main Specifications of CS-M1 Rated Input: Line: 200mV～225mV, Phono: 3mV～3.5mV Rated Output: 1V (0dB) Maximum Allowable Input: Line: <1.7V / Phono: <28mV Power Supply: AC 9V Current Consumption: 500mA Input Terminals: RCA Output Terminals: RCA Dimensions: 192(W) x 236(D) x 98(H) mm Weight: 2.8kg Accessories: None