You can use the card to buy audio or a wall mount for your TV.
Brad's Deals Editor David,
Get this Vizio 48" Smart TV (model D48-D0) plus a $150 Dell eGift Card for $379.99 and free shipping at Dell.com. This matches the lowest price online, but the addition of the gift card makes this the better deal (read more about it here). This is a 1080p HDTV and has built-in WiFi for streaming content from the web. Note: The gift card is noted in the shopping cart after you add the TV. It will arrive separately via email. Sales tax is charged in most states.