Features: 3.7-4.2V battery detection module with multicolor LED indicators and 5x9.5mm size ensuring accurate real time power monitoring for electronic. Features three color LED status lights, standardized connectors for integration, and advanced low power circuitry to battery in space constrained projects. Ideal for enthusiasts, electronics engineers, and developers creating portable charging adapter, handheld gadgets, or device requiring reliable battery management solution. Perfectly integrates into drones controllers and other mobile equipment needing visual feedback on battery charging level. Combines professional grade electricity measurement accuracy, making it indispensable for both prototyping and commercial applications in battery power. Specifications: Component: Electronic Component Size: Approx.5x9.5mm/0.19x0.37inch Package Includes: 2 Optional Package: Package 1 Include:5Pcs Measurement Module Package 2 Include:10Pcs Measurement 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.