RidePower SAE-Dual USB Adapter with Digital Voltage Indicator SAE Plug to Dual USB Ports Adapter with a LED digital voltage indicator plus dual USB cover. The Digital SAE to Dual USB Adapter is designed to connect directly to your battery connector cable. The dual port USB allows you to connect and power 2 devices at one time up to 2 amps each. Features With the 2 USB ports, you can charge two devices at the same time Detect and display the voltage of your battery Built-in integrated shorting protection circuitry Rugged, dependable and water resistant Noise reduction from ignition systems