The shell of this MM phono amplifier is made of aluminum, which is sturdy and durable. The power supply part has been upgraded, and a power supply is specially equipped to power this phono amplifier, which greatly reduces the noise floor. The current noise floor level is close to that of previous recorders and walkmans. This is a very compact MM phono amplifier with a full gold-plated RCA interface, a grounding port, and is portable. Working voltage:12-15VDC Amplified output:200mV/1.8V Output impedance:200 ohms, input 47k ohm Special note: Some ordinary record players on the market do not have PHONO output. They are usually built-in ordinary amplifiers, and the output is also direct RCA output, so they are not suitable for this phono amplifier. Therefore, if you want good sound quality, please buy a record player with slightly better quality, at least with PHONO output. In this way, you can get the best audio-visual effect. The connection method is as follows: Record player PHONO output → PHONO phono amplifier (that is, this machine) → AV power amplifier → speaker Plug Type:US Plug, it applies to Canada, India, Mexico, Thailand, Taiwan, the United States, the Philippines and so on. / EU Plug,it applies to Indonesia, Germany, France, Spain, Italy and so on. Voltage:AC100-240V Color:Black Material:Aluminium Package Contents: 1 * Phono amplifier 1 * 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.