Power Amplifiers descriptions： We use high-quality raw materials, all materials are very suitable for the product, please rest assured to buy. Pp500 Ultra Compact Phono Preamp Preamplifier With Level & Volume Controls Rca. Features: Ultra-compact Phono Preamplifier with Metal Body, Portable and Durable. 2 * RCA (L & R) Inputs, 2 * RCA (L & R) Outputs, 1 * 1/4 Inch TRS Output, Multiple Connection Choices.with Level and Volume Control Knobs.for Converting the Phono Signal to a Line High Level Signal . Ultra Low-noise Audio Performance Offers Excellent Sound Quality. Specifications: Terminal: RCA, 1/4 Inch TRS Power Adapter: European Standard Plug Plug Type :EU Plug Size:10.3*5.7*3cm Material: Metal Package Included: 1 * Preamplifier 1 * EU Plu . Products number : SOMONO156702