Features: This driver board for 39db 45db 52db 60db meter heads features imported IC chip with dynamic compression, ensuring precise sound indication without sticking or bottoming out issues, making it a top sound meter driver board Key attribute include not need for separate power supply, reducing costs and space; low pass filter for high frequency; adjustable output sensitivity; 12V compatibility; reverse polarity protective; start to prevent damage for IC driver board. Ideal for car sound installer, and professional sound who require a dependable meter head driver for sound setups and testing applications. Perfectly suited for car sound systems, PC computers, and harsh environments like unstable power supplies, where stable and accurate sound monitoring. Suitable for fine tuning and robust components, this driver board guaranteeing long lasting stability and easy integration into various electronic projects. Specifications: Component:Plastic Size:Approx.55x46mm/2.16x1.81inch Package Includes: 1Pc Driver Board note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.