From the text, we may infer that both products ….
I. are equipped with noise reducing material
II. are manufactured by the same company
III. have different operating time
IV. offer discount on purchase
V. are battery-powered
From the text, we may infer that both products ….
I. are equipped with noise reducing material
II. are manufactured by the same company
III. have different operating time
IV. offer discount on purchase
V. are battery-powered