FNIRSI FNB38 USB Voltage And Current Meter Capacity Fast Charging Protocol Tester 1. Suitable for decoration, industrial laboratory testing, industrial real-time monitoring 2. Made of durable plastic material, can withstand strong working pressure, compact design, safe and reliable 3. LCD screen real-time display voltage, current and output voltage data 4. The top of the voltage tester is waterproof to avoid short circuit and circuit, the interface is safer and more hygienic 5. The voltage output can be stable and reliable with high working power, which can save your measuring time 6. This product has good high power performance, fast, stable and reliable response 7. With stable performance, the output voltage can be turned off at the desired temperature 8. The power supply is strong and reliable, the voltage output turns on automatically when the power is turned on or off Parameters: 1. Input voltage: 4-24V 2. Input current: 0-5A 3. Input power: 0-120W 4. Load equivalent internal resistance: 0-9999.9 ohm 5. D+D- voltage: 0-3.3V 6. Size: 69 x 30 x 9.5mm