The Rosslare AT-D1K-000-0SB0 is supplied as a pack of 25 black Shark key fob credentials for access control systems. Rosslare lists this SKU as a not-programmed MI-FARE Classic EV1 1K, 4UID Shark key fob with no ID printed. Each credential operates at 13.56 MHz and contains an original NXP chip. The cards and fobs in this Rosslare credential family are available in 1K and 4K memory sizes, with key fob form factors including Shark, Ring, and Twist versions. This model is not formatted from the factory, making it suitable for access control projects where credentials need to be programmed or configured according to the system requirements before use. Rosslare also notes that MI-FARE Classic EV1 credentials can be used with Rosslare's O2S platform or supplied unprogrammed. The Shark key fob is made from black PC material with an EDM textured finish. Rosslare lists the Shark fob dimensions as 1.46 x 2.44 x 0.18 inches, with read range within 1.18 inches and operating temperature from -4°F to 122°F.