Our power meter can capture a range of basic data, including cumulative capacity in Wh (watt-hour) and Ah (ampere-hour) over a long period of time, real-time current (I), real-time power (W) and real-time voltage (U). This device is your precise tool for measuring the charge and discharge capacity of RC lipo batteries. Parameters: Size: 60mmx38mmx13.5mm Screen: 1.5 inches, LCD Refresh rate: 3Hz Voltage range: 8-150V Withstand current: 50A (instantaneous 100A, within 3 seconds) Voltage accuracy: 0.2% Current accuracy: 0.5% Interface: gold-plated XT90 Silicone wire: 10AWG Colour:black Material:ABS Note: 1. Long-term operation above 50A may affect the accuracy of the meter. 2. The device does not work below 8V and cannot measure voltages below this threshold. 3. To maintain the accuracy of the measurement, please avoid modifying the product. Each tester is factory calibrated for optimal performance. 4. The analyzer has both charging and discharging functions, and the screen displays positive or negative current. 5. Press the reset button to switch the display interface; long press to reset, the capacity is zero. 6. Due to different batches, there may be differences in product appearance and printed text, which not affect use Package Contents: 1 * XT90 8-150V Power Meter Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.