Not only does it use insulating and flame retardant materials for effective heat dissipation, this power adapter also supports short circuit protection, overload protection and overvoltage protection, allowing you to use it safely. Supporting 3-12V multi-speed adjustment and with a DC connector, this power adapter is widely compatible with a wide range of devices to meet your needs in various usage situations. It is constructed of ABS material. The length of this product is 8.5cm, the width is 5cm and the height is 3.4cm. Suitable for home, travel, and office use, this power adapter has a wide range of uses. Item Name: Power Adapter Material: ABS Rated Power: 30W Input Voltage: AC100-240V 0.25A 50/60Hz Output Voltage: 3V/4.5V/5V/6V/7.5V/9V/12 USB Output: 5.0V2.1A DC Head Output: 2.5*0.7mm, 3.0*1.1mm, 3.5*1.35mm, 4.0*1.7mm, 5.0*2.1mm, 5.5*2.5mm Features: Multi-position Adjustable, with USB Interface Expansion, Indicator Light Size Details: L: 8.5cm/3.35", W: 5cm/1.97", H: 3.4cm/1.34"(Approx.) Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Power Adapter 6 x DC Adapters 1 x Voltage Regulation Key