Features: 3.7-4.2V battery detection module with multicolor LED and 5x9.5mm size ensuring accurate real time power monitoring for electronic. Features three color LED 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 battery management solution. Perfectly integrates into drones controllers and other mobile equipment needing visual on battery charging . Combines professional 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 Package 3 Include:1Pc 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.