High Performance Transfer Speed Up To 100Mb/S With Uhs-I U1 Class 10 Specification. For Android Smartphones, Tablet. Durable With 4 Proof Water Proof, Temperature Proof, Magnet Proof And X-Ray Proof. The Strontium Nitro A1 Micro Sd Sdhc And Sdxc Memory Card Is Designed To Last Even Against Water, Shock, Magnet And X-Ray. Backed By Strontium Lifetime Warranty.