Feature:OOTDTY1, This product is fully functional, you can display the battery battery power, you can also plug directly into the phone or other 5V equment charging.2, This product is suitable for all kinds of outdoor power, mobile power, instrumentation and other equment additional battery power display and additional USB to the phone and other functions.3, this product s synchronous rectification step-down scheme, low heat, energy saving and envmental for protection.4. This product is compact in structure, ing full of space and reducing costs.Product s1. Static input current: 5-25mA, the lower the battery the smaller the current.2, USB output: 5V/2A (a USB setting for recognition, a setting for recognition)3. USB efficiency is up to 96% (beca of the synchronous rectification circuit, the conversion efficiency is high and the heat is low.4.8 segment power resolution: 10% 25% 40% 50% 60% 75% 90%5. The accuracy of the is about 2%6 working temperature: -10 ~ +65 ° C7. Working humidity: 10~80% (no condensation)8. Opening size: 45 × 26 × 18mmNote:Item color displayed in photos may be showing slightly different on your computer since s are not calibrated same.Please allow 1-3mm slight deviation due to manual measurement. Thank you!Package Includes:1 * Blue LED Dial Display