Ultra-phono preamplifier with metal housing, portable and durable.2xrca (left and right) 2xrca input (left and right) 1x1/4 inch output, multiple connections. With level and volume control knobs. Convert phone signals to line-level signals. Ultra-low audio performance, ensuring sound quality. Specification:Item Type: Phono Preamplifier Connector: 1/4 inch RCA connector Power supply: DC 12V Input: 110-240V 50/60Hz Output: 12V 500mAUnty: it is a preamplifier, not a power amplifier. Please do not place an order to know what a preamplifier is! This link is special for professional or old customers. Plug type: US plug, applicable to Canada, Mexico, Thailand, Philippines, Taiwan and so on. Size: 10.3x3x5.7cm Material: MetalColor: BlackPackage Contents:1 x Phono1 Preamp AdapterOnly the above package content, other products are not included. Note: The light and different displays may cause the color of the item in the picture to be slightly different from the real thing. The allowed measurement error is +/- 1-3cm.