About this item Universal USB Charger - Adopts wide input voltage (AC 100-240V), longer and more stable charging, compatible with almost any smart device with DC 5V input. ON/OFF Power Switch - There is a switch to control power supply so that you could plug continuously. The 5ft cord made it convenient to use. Absolutely Safety - The built-in over voltage, over current, the leakage and short circuit protection module, adopt high quality high temperature resistant fireproof material, effectively to ensure the safety of equipment. Smart Identification Ports - Automatically detect all connected devices, adjust the output accordingly, which allows you to efficiently charge various combinations of smartphones and tablets at their optimal output. Dimensions: 5.78 x 2.5 x 0.01 inches.