Features 1.COMPACT AND DURABLE: Phonograph preamplifier is housed in a metal case for rugged durability. Compact structure design, easy to carry. 2.MULTIPLE CONNECTIONS: Supports 2 RCA (L and R) inputs, 2 RCA (L and R) outputs, 1 1/4in output to meet different sound equipment connection needs. 3.CONVERT SIGNAL: The phono turntable preamp converts phono signals to line level signals, providing excellent sound quality, plug and play. 4.LOW NOISE: This phono preamp utilizes an ultra low noise operational amplifier and provides independent output volume control. 5.RIAA EQUALIZATION: The PP500 phono preamplifier equalizes the turntable signal according to RIAA s to deliver premium sound. specificationItem Type: Phono Preamp Material: Iron Shell Input: Type: RCA Connector Impedance: 47kW Maximum Input Level: -23.5 dBV at 1kHz Output: Type: RCA and 1/4in, Stereo Connectors Impedance: 50W Maximum Input Level: +11.5 dBV at 1kHz Frequency Response: RIAA THD: 0.06%typ. at -40dBu/1kHz Gain: 35dB SNR: 68 dBu at 0 dBu, A Weighted Input Sensitivity: 5.3mV at 1kHz Voltage: 100-240V PackageList1 x Phono Preamp 1 x Instruction Manual 1 x Adapter