The Chinese counterfeiters often added pirated Cisco software and unauthorized, low-quality, or unreliable components – including components to circumvent technological measures added by Cisco to the software to check for software license compliance and to authenticate the hardware. To make the devices appear new, genuine, high-quality, and factory-sealed by Cisco, the Chinese counterfeiters allegedly added counterfeited Cisco labels, stickers, boxes, documentation, packaging, and other materials. The fraudulent and counterfeit products sold by the Pro Network Entities suffered from numerous performance, functionality, and safety problems. Often, they would simply fail or otherwise malfunction, causing significant damage to their users' networks and operations – in some cases, costing users tens of thousands of dollars. Customers of Aksoy's fraudulent and counterfeit devices included hospitals, schools, government agencies, and the military.