Features: Output: 19.5V 2.31A 45W; Input: AC100V-240V 50/60Hz; Connector Size: interior diameter: 2.0mm; external diameter: 4.5mm. Made of quality components and circuit board, flame retardant housing material, high strength, wear-resistant, quick heat-dissipation, safe and reliable. Dustproof designing, no screw holes in the whole body, seamless-fit between gaps, can act great role in dust prevention and simple waterproof. Nickel-plated copper-core plugs, high-temperature resistant, surfaces flower-clenched processing, outstanding texture, comfortable feel. Multiple protections, with overcharge protections, intelligent power-supply, overcurrent, over-voltage, constant temperature, short circuit protections. Wide compatibility, suitable for laptops, smartphones, tablets, mobile power pack, monitors, switches, digital electronics, etc with DC4.5X2.0mm port, great for home, office, travel and other indoor uses. Specifications: Material: ABS Color: Black Size: about 108x46x31mm/4.25x1.81x1.22inch Input: AC100V-240V 50/60Hz universal Output: 19.5V 2.31A Power: 45W Interfaces: outer diameter: 4.5mm; inner diameter: 2.0mm Note: If you do not know whether your machine can use this adapter, you can check whether the output parameters (voltages and current) of your original adapter match. If original adapter is lost, you can check the parameters at the bottom of the computer or the manual of your machine. Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different monitors resolution. Package includes: 1pc 4.5x2.0mm Power Supply Adapter