Operating the RCA WP4UAR USB Wall Plate Charger
Using the Switchable 2.1 USB Outlet:
The bottom 2.1 USB outlet is switchable to support the different charging circuitries used by different tablet manufacturers. This outlet can charge smart phones with non-standard USB as well as tablets.
Before using this outlet, make sure you have the switch below this outlet set to the right position for your device, as shown here. You must have it set BEFORE you plug in your device. As a rule of thumb, leave this switch in the B position unless you have an Apple (A) or Samsung (C) product.
Note about tablet charging: This wall plate charger has 2 banks of 2 USB charging outlets each. Each bank provides enough power for full-speed charging for 1 tablet or 2 smartphones. In other words, the wall plate charger can provide full-speed charging for up to 2 tablets or 4 smartphones at the same time. For full-speed charging of tablets, you should charge it by itself in its bank--you can still use the other bank for either a single tablet or 2 smartphones, as shown here.