It’s a small, low-cost charger with a pair of USB-A ports that can the two place out approximately 12W of power (24W total). That’s sufficient to charge iPhones and iPads, most Android gadgets, and many other USB gadgets at a fairly sensible clip. Multiple standards have been proven for charging https://flenzy.store/efficient-12v-8kw-all-in-one-diesel-air-heater-with-lcd-and-remote-control-fast-heating-low-noise-and-easy-installation/