Product features:1.6.5A large current, maximum resolution 0.00001, real-time monitoring of subtle changes in voltage, current and power during charging2.6 Digits display high precision, supporting multiple fast charging protocols3. CNC metal shell design, light and delete touch, with 1.77-inch high definition display screen, multiple displays on one screen, and clear data at a Glance4. The main fast charging protocol can detect detection5. Equipped with gravity sensing function, 360 degree roller is comprehensive and supports closing/opening6.10 Group data intelligent recording7. Multi USB port compatibilityProduct parameters:Monitoring voltage: 4-24V, resolution: 0.00001V, accuracy: (0.2%+2)Monitoring current: 0-6.5A, resolution: 0.00001A, accuracy: (0.5%+2)Monitoring power: 0-156W, resolution: 0.00001W, accuracy: (0.5%+2)Load equivalent internal resistance: 0~9999.9 , resolution: 0.0001 , accuracy: (0.5%+2)D+/D-voltage: 0-3.3V, resolution: 0.001 V, accuracy: (1.0%+2)Equipment temperature: , resolution: 1 , accuracy: (1.2%+3), , resolution: 1 , accuracy: (1.2%+4)Capacity: 0~9999.99Ah, resolution: 0.00001AhPower consumption: 0~9999.99Wh, resolution: 0.00001WhCable internal resistance: 0~9999.9 , resolution: 0.0001 Running time: 99 days, 23 hours, 59 minutes, 59 seconds, resolution: 1 secondRecording time: 999 hours, 59 minutes, 59 seconds, resolution: 1 secondPackage list:FNB48P BT version USB charging tester * 1 (Blue)OrFNB48P No Bluetooth order USB charging test * 1 (Silver)