Help!!! Want to buy a Wireless bullet for Wife

Hi All. I am looking for a gift for my wife. A small bullet that is wireless that can be placed in the gusset of her underwear. I know they make vibrating panties for this but we already have underwear that are sewed on 3 sides perfect for a small vibrator to hide and be worn in public.

I am not sure the perfect vibe for this.

Also, Anyone have any experience with this, I would greatly appreciate. I would love to hear suggestions or past experiences of something like this.