Customized Wallets, Azusa Phone Wallet Car Vent Holder - Magnetic Mount & Residue-Free, Our Azusa phone wallet is perfect for your cell phone. Hold your essential cards and attach it to the magnetic car vent holder to use your phone hands-free while driving. The wallet attaches to the back of most flat-backed cell phones with a strong adhesive that removes without leaving residue behind. The wallet will not demagnetize cards. Holds up to two cards so you can leave your wallet or purse behind. ... #EB9048 $7.84/each.