Feature: 1. DC 12V Power Adapter and Dual Gain: Phono amplifier comes with a DC 12V power adapter, so it is no longer limited to application scenarios. Considering that the signal of the phonograph is relatively weak, the PP500 adds a set of gain adjustment to the input and output to ensure that the volume can be played perfectly. 2. Low Noise Operation: PP400 record player amplifier low noise op amp provides excellent performance. The output is 2V (PP) at maximum10K ohms. It is best to place the preamp close to the source to reduce unwanted noise and interference. 3. High Sensitivity: Phono turntable preamp can convert sound signal to line level signal, this advanced circuit sound preamp, input sensitivity electromagnetic pickup. Independent knob control operation, more convenient for you to operate. 4. Connect to Phono Turntable: Phonograph amplifier connects any turntable to modern sound equipment without the need for a dedicated phono input to amplify your music. For the receiver, it can be connected to speaker, computer, laptop, etc. 5. Plug and Play: This mini preamp with stereo RCA inputs and stereo RCA outputs, easily connect the turntable to the RCA inputs and ground. Then also connect the amplifier receiver to the RCA output. Plug and play, convenient to use. Specification: Item Type: Phono Turntable Preamp Material: Metal Model: PP400 Colour: Black Scope of Application: Record Player Plug Voltage: 100-240V . Package List: 1 x Phono Turntable Preamp1 x DC 12V Power Adapter1 x Manual