because that car has all the options. And they definitely have proven to be reliable thus far. For example, I wear a size 8; these feel like theyre a 7 1/2. It doesn?t come with directions. They work well ? I feel that ever since the whole "battery incident" with the note a few years ago, they really stepped it up and are providing a superior product to apple. cheap is a bad word. With these, I can now drop barbells and dumbbells without pissing anyone off! You would seriously think they were far more expensive than they are. Trustworthy!