Charge any combination of four 5V USB devices simultaneously, such as phones, tablets and more. Detect your device to deliver ideal current up to 2.4A at its fastest possible speed. Approve the maximum current 2.4A for each port to defend the integrity of devices and avoid accidents. Conversion rate of energy reaches up to 88%, which causes less unnecessary heat and is more environment-friendly. Certified by CE, RoHS; surge protection, temperature control and other intelligent protection keep your devices safe. Compact and portable, detachable 2 prong power cord allows using at home, the office or in travel even if in other countries.