Feature:1. Suitable for various scenes, such as DIY, car audio conversion, home audio, etc.2. Simple installation, simple wiring operation, novices can easily get started.3. One driver board can control two VUs, adjust the brightness of the backlight, and adjust the amplitude of the pointer swing.4. With white backlight display, it can be read clearly even in dim environments, practical.5. Made of high quality ABS material, which is sturdy and durable for long time use.Specification:Item Type: VU MeterMaterial: ABS+PCBColor: As shown in the pictureVU Meter Size: Approx.9x7x3.5cm/3.5x2.8x1.4inDriver Board Size: Approx.6x5x2.5cm/2.4x2x1inVU Meter:Current Sensitivity: 600uA10%Internal DC Impedance: 65010%Insulation Resistance: More than 50MFriction: 1mmPointer Length: 441mm from the needle end to the axesPointer Width: 0.450.05mmInstallation Position: VerticalBacklight Plate: 2.8-3.8V 10mA whiteDriver Board:Power Supply: AC/DC 12-18V 5WSignal Input: 0.775VBacklight Power Output: 2V-12V 120mA.Package List:2 x VU Meter1 x Driver Board6 x Flat CableNote:1. Please allow 1‑2in error due to manual measurement. Thanks for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.