" Feature: 1. Thoughtful design: This desktop power grommet is built-in cell phone charging protection circuit to reduce charging damage to cell phones and batteries. 2. Dust-proof: This sliding cover of Desktop power supply can be easily opened and closed with a sliding cover that prevents dust from entering the two USB ports. 3. Easy to install: This power supply can be embedded on the table, dig a hole with a diameter of 3 .5cm on the table, put it and plug it into the power supply and it can be used. 4. Dual USB Port: The USB port of this desktop socket charging station can charge all brands of mobile phones as this USB port is compatible with all brands of mobile phone systems. 5. Desktop power supply: This power source is hidden on the desktop and does not affect the use of your desktop, after installation, easily connect your device. Specification: Item Type: Desktop Power Grommet Material: ABS Input Voltage: 5v - 1a Output Coltage: 5vx2 Power Cord: 1.5m or 59 .05in Installation Diameter: 3.5cm or 1.37in Package List: 1 x Desktop Power Grommet"