This product is either discontinued or we cannot get that from suppliers.
HP 1820-48g-poe+ (370w) J9984A, Network Ports-48, Port / Expansion Slot 48 x Gigabit Ethernet Network, 4 x Gigabit Ethernet Expansion Slot, Expansion Slots-4, SFP Slots-4, Twisted Pair, Optical Fiber, Gigabit Ethernet, Network 10/100/1000Base-T, 1000Base-X, Compatible Rack Unit 1U, Flash Memory 16MB, MTBF 394638 Hour, Input Voltage 120 V AC, 230 V AC, Standard 128MB.
HP 1820 Switch Series devices are basic smart-managed, fixed-configuration Gigabit Ethernet Layer 2 switches designed for small businesses looking for key features in an easy-to-administer solution.