CCB 16GB Micro SD Card supports up to 79MB/s read speed and up to standard write speed for data transfer. (Based on internal test environment of CCB, so the actual speed may vary with different host devices and environments. For devices that don't support UHS-I, the transmission speed will be different due to interface limitations.) -CCB 16GB Micro SD Memory Card supports UHS-I, U3, Speed Class 10, Video Speed Class 30 (V30) , which offer high read speed, fast file transfer speed, smooth as well as continuous shooting -CCB microSDXC card supports waterproof (Provide protection against water immersion for up to 30 minutes and water depth up to 1 meter.), shockproof, extreme temperature resistance [operating temperature: 0° ~ 70° C, storage temperature: -25° ~ 85° C], X-ray radiation proof, anti-static and mechanical impact of 500G acceleration. Strong and Durable! -CCB microSD Card is compatible with smartphone, tablet, drone, camera and other Android devices. It provides you with speed and storage to capture more adventures OTG, also give you fast gaming experience. What's in the box