The USB dual watch small size, at the same time, with the screen display USB charging or discharge voltage, current, alternating or single display capacity, power With the company's "USB discharge resistance" can be easily tested USB mobile power, rechargeable Po, mobile phone charger, USB power supply output current is up to standard, as long as the USB discharge resistor connected to the USB port on the line At the same time through the USB tester with the shop sales of USB discharge resistance test USB cable is good and bad, would like to know the test method or understand the USB discharge resistance, please click on the following picture: The USB dual table with one end input, both ends of the output: "OUTPUT I" (two functions): suitable for all original charger (including Apple series), charge recognition using the charger USB port, do not make any changes Data communication function: input to the computer, connect the phone or other USB mobile devices, you can transfer data with the computer, and can view the transmission voltage and current value Charge voltage output: the input plug into the original charger, connect the phone or other mobile devices, you can charge, the charge current size by the charger USB port charging identification line and USB charging equipment compatibility to determine "OUTPUT ?": mouth built-in intelligent charge recognition IC: mainly for "non" original charger, also suitable for original charger, charging recognition by the intelligent identification IC to match Can automatically match the "suitable, safe high current" charge for your cell phone So that the charging device can be in the most secure conditions, the use of the largest current for fast charging, significant savings in charging time (maximum savings of 60% of the charging time) Let your cell phone, the board is no longer just pick a dedicated charger