What are the questions to ask when buying a hand switch

American customers have seen our hand switch products from our company Ali, and are interested in our hand switch products. I sent the customer specific information about the hand switch, and explained to the customer because there are many types of hand switches in our company, and asked the customer what kind of equipment the hand switch is used for. And asked the customer how many cores and gears of the hand switch, and sent an email to the customer to introduce the product type of the hand switch to the customer, the picture of our hand switch is as follows: