5.5mm x 2.1mm to Big Square USB Power Converter Cable for Lenovo Thinkpad/ThinkBook/Xiaoxin

1. Power adapter cable for Lenovo laptops 2. Square port to round port 3. Input(female): square port 4. Output(male): 5.5*2.1mm 3. Length: about 13cm 4. 5.5x2.5mm Female Interface