USB Tester, Costyle 1 Pack USB Digital Power Multi Meter Tester Multimeter Current and Voltage DC 0-5A 3.6-32.5V, Test Speed and Quality of Power Bank, Cable, Charger (Red OLED) CONVENIENT MULTIMETER FOR DAILY LIFE: With the handy tester you can judge the performance of the charging equipments and get some data of the devices you are charging. It is very simple to use. Just plug directly into any USB socket or cables without additional power supply. It supports QC 2.0, QC 3.0, Android BC1.2, iPhone 5V 2.4A and ATK-PE voltage test. 3 DISPLAY MODES: Click the button and you can switch 3 various display modes. The clear OLED monitor can display all the data you need, such as voltage, current, capacity, watts, elapsed charging time, voltage of all 4 pins and so on. The data will be saved until you reset them, even the electricity of the USB tester is cut off. MULTIFUNCTIONAL USB TESTER: You can easily measure the USB ports(such as PC USB, wall/car chargers), get the true capacity of your power bank or solar charger, test the speed or quality of your charging cables, get the detailed charging data to prevent any accident... You can find more funny functions with this USB Tester! PORTABLE BUT ACCURATE MULTIMETER: The USB tester fits to personal use, factories and laboratories. It is very lightweight and very easy to take away. Just take it out of your bag or your pocket when you need it. Strong anti-interference ability enables its stable and reliable performance. It perfectly performs like those huge and professional multimeter. WHAT YOU GET: 1x USB Safety Tester, 1 year Warranty and Costyle warm customer service. If you have any questions or anything you feel unsatisfied with, please feel free to contact us by message. We sincerely hope that our products and customer service can offer you a GREAT PURCHASING EXPERIENCE on Amazon!