Features: The KA2284 sound level indicator module features sound level and battery level indicator with adjustable sensitivity, suitable for 3.5V-12V power input for electronics integration. With high sensitivity detection and LED indicator, this module offer real time visual feedback for sound signal strength or battery status in project. Ideal for electronics enthusiasts, and creators needing precise signal monitoring in amplifiers, or portable battery powered devices. Perfect for sound equipment setups, charge monitoring, or educational electronics kit requiring space efficient visualization. Engineered with components and standardized connectors, this module ensuring integration into circuits while maintaining accuracy across fluctuating conditions. Specifications: Size:Approx.29.7x21.4mm/1.16x0.84inch Supply: 3.5V to 12V Package Includes: 2 Optional Package: Package 1 Include:1Pc KA2284 Level Indicator Module Package 2 Include:3Pcs KA2284 Level Indicator Module 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.