You get 10 of them.

The Cisco CP-8831-DCU-S Display Keypad USB Control Unit is a gray-colored IP phone display keypad controller designed for use with VoIP IP conference phones. It features Power Over Ethernet (PoE) capability and a USB-C interface for easy connectivity. This unit is sold in a quantity of 10 and is ideal for enterprise networking and IP PBX systems. With its reliable brand reputation and advanced features, the Cisco CP-8831-DCU-S is a high-quality choice for businesses looking to enhance their communication capabilities.