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+PCB Color: As shown in the picture VU Meter Size: Approx.9x7x3.5cm/3.5x2.8x1.4in Driver Board Size: Approx.6x5x2.5cm/2.4x2x1in VU Meter: Current Sensitivity: 600uA±10% Internal DC Impedance: 650Ω±10% Insulation Resistance: More than 50MΩ Friction: ±1mm Pointer Length: 44±1mm from the needle end to the axes Pointer Width: 0.45±0.05mm Installation Position: Vertical Backlight Plate: 2.8-3.8V 10mA white Driver Board: Power Supply: AC/DC 12-18V ≥5W Signal Input: ≤0.775V Backlight Power Output: 2V-12V 120mA . Package List: 2 x VU Meter1 x Driver Board6 x Flat Cable Note: 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.