And if he cannot tell you clearly, file an Item Not As Described dispute to get a refund.
Note- if you bought from a seller who used the Global Shipping Program to ship from the USA, you will probably get a refund without the usual demand for proof that you have returned it to the seller.
If you bought from China, you will be required to provide Proof of Delivery to the seller. This will cost around $40.
If you bought from China, the item was made to be sold, not made to be used. It won't work because it can't work. Throw it away and count it as a learning experience.
Yeah, I hate those too.