5 Pack SanDisk Ultra 64GB Class 10 microSDXC UHS-I Water/shockproof Memory Card (Certified Refurbished) This Certified Reconditioned product is tested & certified by SanDisk to work like-new. The product includes all original accessories, and is backed by a 90 Day warranty Pack of five (5) microSDXC The Sandisk microSDXC is waterproof, protected against airport X-rays, and capable of withstanding up to 500G of shock SD Class 10 rating along with an Ultra High Speed Class 1 rating Read speeds up to 30 MB/s and lower write speeds that should at least be able to exceed the Class 10 minimum of 10 MB/s