Ultra low noise audio performance, provides sound quality.Ultra-compact phono preamp with metal shell, portable and durable.2 * RCA(L & R) input + 2 * RCA(L & R) output interfaces.With level control konbs for adjusting volume.For converting the phono signal to a line level signal.Mains connection: external supply,12 V / 150 mAWeight approx. 0.40 lbs / 0.180 kgInput:Type RCA connectorImpedance approx. 47 kWMax. input level -23.5 dBV @ 1kHzOutput:Type RCA and 1/4inch , stereo connectorsImpedance approx. 50 WMax. output level +11.5 dBV @ 1 kHzSystem Specifications:Frequency response:RIAA:0.06% typ. @ -40 dBu/1 kHzGain:35 dBSignal-to-noise :68 dBu @ 0 dBu, A-weightedInput sensitivity:5.3 mV @ 1 kHzNOTE: This is a Preamplifier, not amplifier.Pls do not place order until you know what a preamplifier is Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on.Type: Phono Preamp Number: -750Scolor:BlackMaterial:Metalsize:32 x 103 x 64 mmPackage Contents:1 x Phono Preamp1 x AdapterOnly the above package content, other products are not included.Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.