From Manufacturer
This is a set of five 128GB Sony SxS PRO+ Memory Cards from Arri. Each of the cards allow for in-camera recording of compressed formats in ALEXA Classic EV, ALEXA XT/XR, and ALEXA SXT cameras. Each card features a maximum read speed of 1.6 Gb/s and a maximum write speed of 1.5 Gb/s, with minimum read speeds of 1.3 Gb/s. These fast data transfer rates make the card suitable for reliable capture of 4K high-definition video at high frame rates. An intelligent controller prevents speed degradation when the card is used in compatible Sony cameras. Benefit from extended recording times: approximately 20 minutes in 4K XAVC Intra 4:2:2 60p at 600 Mb/s and 240 minutes in HD MPEG2 4:2:2 30p at 50 Mb/s. The maximum recording time possible with this card is 400 minutes at 35 Mb/s. The SxS PRO+ also supports an array of recording codecs.
Please Note: Most Arri cameras require an SxS adapter for using this memory card, since most cameras are not compatible with the ExpressCard/34 cards.