QuikVolt Wyoming Cowboys WP-400X 4-Port USB Wall Charger - White With the WP-400X USB Wall Charger, there's no need for additional chargers for different devices! The Opti-Charge function automatically senses how much power your device needs to charge efficiently and fully. Output has a 5V-4.2A max. The WP-400X has 4 USB ports, allowing you to charge up to 4 devices at the same time. This Officially Licensed product features the Wyoming Cowboys logo in full color print and a colored, light-up ring that shines when plugged in. Size is 2.375" x 1.9" x 1.375". Prongs fold closed for easy storage. Compatiblewith most smartphones, tablets, video games, cameras, and more. The WP-400X is UL Listed and FCC certified.