Features: 1[Easy to Install] 2 VU meters and 1 driver board the wiring operation is simple and novice can easily get started. 2[High Performance] One driver board can control two VUs and three potentiometers have a clear division of labor. 3[Adjustable] The brightness of the backlight and the amplitude of the pointer swing can be adjusted which is a good helper for the recording engineer. 4[Backlight Design] VU level meter has a backlight design which can read clearly in a dim environment with high accuracy. 5[Scope of Application] The high accuracy VU meter is widely used in DIY home sound car sound conversion etc. Specification: Item Type: VU MeterMaterial: ABS PCBFriction: 1mm/0.04inPointer Length: 701mm from Needle End to AxesPointer Width: 0.450.05mmMaximum Current Sensitivity: 1mA 10%Internal DC Impedance: 10010%Insulation Resistance: More Than 50mMeter Installation: VerticalBacklight: White Backlight 3-3.2V 80mAGross Weight: Approx. 392g/13.8ozScope of Application: Suitable for DIY Recording Studio Medical Equipment Etc. Package List: 2 x VU Meter1 x Driver Board6 x Cable1 x Sound Cable1 x Manual