If you received an email from keephifi like this below, it means you get a gift card, which you can use to buy any product you want on keephifi.
Step 1: Check your email
How to use it?
You can activate your gift card via the email and then you can see the code. If you get $10 gift card, you can get $10 off for your orders. UUE(use until exhausted).
Step 2: Activate(View) your gift card
Step 3: Check Out
Spend Less Enjoy HIFI
