SD4/4GBCI is a flash memory card from Kingston Technology that is designed to be used in embedded and industrial applications. The card can support up to 4GB of storage capacity, which is enough for storing multimedia files, data records, and other data. The card is designed to be fast and reliable, meeting the requirements of operation in a wide variety of temperatures and demanding environments. It features a write protection switch and a write-protect indicator. It is also designed for durability and has a rugged metal casing to protect it from shock, dust, corrosion and water. SD4/4GBCI cards are used in applications such as digital signage, camera surveillance systems, industrial automation, gaming machines, automotive, healthcare and home security systems.