Designed for professional photography and high-end cinematography, Exascend's Essential UHS-I SDXC 128 GB memory card lets you keep up with extreme resolutions and high-speed snapshot series. The card has a 128GB capacity and uses the UHS-I bus to deliver a maximum sequential read speed of 170 MB/s and a maximum sequential write speed of 140 MB/s. With a V30 speed class, minimum write speeds will not drop below 30 MB/s. To make it easier to use the card in almost any environment, and to keep the contents safe, Exascend has built the Essential Series with a rugged design that is resistant to water, dust, impact, X-rays, magnets and temperatures ranging from -25 to 85 °C. To protect data from accidental deletion, a write-protection switch is built in. Note that if your camera does not support a minimum write speed of 30 MB/s, this card complies with U1 and Class 10 standards, each of which guarantees a minimum write speed of 10 MB/s. Designed for professional photography This Essential UHS-I SDXC card is designed for demanding professional photography applications, delivering high performance at extreme resolutions and high-speed bursts. V30 video speed class High-end video recording requires high write speeds that can be sustained for longer than short bursts. This UHS-I SDXC card is designed to exceed these high requirements and, as a result, boasts a V30 video speed class. Ready for almost any conditions Extreme conditions can provide amazing footage, but only if your equipment can keep up with it. Exascend's UHS-I SDXC cards are designed to excel in temperatures from -25 to 85°C, allowing you to handle even the most demanding shots without worry. Designed for the real world This card is waterproof, dustproof, climate proof, shockproof, X-ray proof and magnet proof.