Feature Highlights: 1. Dual Function Display – Shows both battery voltage and remaining power level at a glance. 2. Direct Charging Capability – Plug your phone or other 5V devices directly into the USB port for convenient charging. 3. Efficient & Cool Operation – Uses a synchronous rectification step-down chip, which minimizes heat and saves energy. 4. Compact & Space-Saving Design – Small size (45 x 26 x 18mm) fits neatly into outdoor power packs, portable chargers, or instrument panels. 5. Easy-to-Read Power Indicators – 8-segment power resolution (10% to 100%) and a clear digital voltage display with about 2% accuracy. Product Details: This mini voltmeter is a handy add-on for outdoor power supplies, portable batteries, and instrumentation. It lets you monitor battery voltage and power levels while also charging phones or other 5V devices via USB. Built with a synchronous rectification step-down circuit, it runs efficiently with very little heat. The compact, plastic housing is designed to save space and reduce overall costs. Installation is straightforward, and the clear digital display makes it easy to check your power status at any time. Specifications: - Static Input Current: 5–25mA (current decreases as battery voltage drops) - USB Output: 5V/2A (includes recognition for standard and Android devices) - USB Buck Efficiency: Up to 96% - Power Resolution: 8 segments (10%, 25%, 40%, 50%, 60%, 75%, 90%, 100%) - Voltmeter Accuracy: Approx. 2% - Operating Temperature: -10 °C to +65 °C - Operating Humidity: 10–80% (non-condensing) - Display Type: Digital only - Model: DL-USB-02 - Power Supply: DC 12.6V - Color: Black - Size: 45 x 26 x 18 mm - Material: Plastic Package Includes: 6 x Digital Display Voltmeter Only the items listed above are included. Note: Slight color variations may occur due to lighting or screen differences. Allowable sizing tolerance is ±1–3 cm.