We built our two charging trailers so that you can use and charge just about any device while you're with us on events that we support. Both trailers have compartments for small devices, and the black trailer has larger compartments for tablets and laptops, tool Each charging compartment has a duplex outlet at the back, so that you can plug in two devices. Bring your charging cord with the plug-in (not just the USB cord). Each rider needs to bring his/her own small padlock to lock the compartment for secure charging. Here's a video on our charging trailers: