10 USB ports Cooling fan Multi-protection Safety System High Efficiency Electric rectification Safe to Use: Multi protection safety system ensures complete protection from electrical short circuit, over-heat, electric surge, over-charging, over current, etc.Efficiency: With appliance of synchronous rectification technology in electric eneregy utilization, conversion rate of electrical eneregy reaches up to 88%, which causes less unnecessary heat and is more environment-friendly.Compatibility: Use this USB charger to charge any digital device that comes with a USB cable. The charging dock station detects the device and self-adjust to a right current level.Function: This product can charge 10 mobile phones or tablets at the same time. Each slot is 0.59" (15 mm) thick. Strong input power, single-port 5V/2.4A 10-port output up to 120W. Features Over voltage protection Yes Number of compartments 10 Operating principle Contact Product colour White Number of devices supported 10 Type Freestan