Note: The product has two knobs to control the adjustment sound, one to adjust the lotus jack sound and the other to adjust the 6.5 jack sound. Specification: Item Type: Phono Preamp_x000D_Material: Metal_x000D_Model: PP500P_x000D_Color: Black_x000D_Scope of Application: Record Player_x000D_Plug Voltage: EU Plug 100-240V Features: 1PRACTICAL: Turntable preamplifier that converts sound signals to line level signals with this advanced circuit sound preamplifier with input sensitivity electromagnetic pickups. 2APPLICABLE: The amplifier can connect any turntable to modern sound equipment without the need for a dedicated phono input to amplify music. For the receiver, it can be connected to speakers, computers, laptops etc. 3DC 12V POWER ADAPTOR, DUAL GAIN: Preamplifier with DC 12V power adapter is no longer limited to application scenarios. PP500P adds a set of gain adjustment on the input and output, the volume can be played perfectly. 4STABLE PERFORMANCE: Low noise sound op preamp provides excellent sound performance. The output is 2V (PP) maximum at 10K ohms. It is best to place the preamp close to the source to reduce unwanted noise and interference. 5PLUG AND PLAY: Mini phono preamp features stereo RCA input and RCA output, making it easy to connect turntables to RCA input and ground. Then also connect the preamp receiver to the RCA output. PackageList: 1 x_x000D__x000D_PhonoPreamp 1 x Power Adaptor 1 x Manual