Swordfish Vari Socket Dual USB (Universal Serial Bus) Charger With this Dual USB (Universal Serial Bus) charger, you can charge 2 devices simultaneously. They will also benefit from Vari Socket amp-adjustment technology, which identifies the energy needs of your device to deliver the most efficient charging. This product also features USB (Universal Serial Bus) short circuit, over-power & over-current protection. Uses up to 3500m A USB (Universal Serial Bus) output. Key features Vari Socket USB (Universal Serial Bus) charger Dual USB (Universal Serial Bus) for charging 2 devices simultaneously 3500m A USB (Universal Serial Bus) output USB (Universal Serial Bus) short circuit, over-power & over-current protection Black & white