Ultra-compact phono preamplifier with metal casing, portable and durable. 2xRCA (left and right) input 2xRCA (left and right) output 1x1/4 inch TRS output, multiple connection options. With level and volume control knobs. Convert telephone signals to line-level signals. Ultra-low audio performance, providing excellent sound quality. Specification: Item type: Phono preamp Connector: RCA 1/4 inch TRS connector Power supply: DC 12V Input: 110-240V 50/60Hz Output: 12V 500mA NOTE: This is a Preamplifier, not power amplifier. Pls do not place order until you know what a preamplifier is! This link is special for Professional or Old customers. Plug Type:US Plug,it applies to Canada, India,Mexico, Thailand, the United States, the Philippines,Taiwan and so on. size: 10.3 x 3 x 5.7cm Material: Metal colour: black Package Contents: 2 x Phono Preamp 2 x Power Adapter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.