ZKFinger SDK 5.3 Standard is charged and it can provide support for ZKteco fingerprint scanners. Its compatible devices are SLK20R and ZK series fingerprint scanners,including ZK4500,ZK7500,ZK8500,ZK9500.The SDK could be work on windows OS, including XP, Vista, Win7, Win8/8.1, Win10, Windows Server 2008/2012 (32/64 bits) OS. Users could develop PC software to get fingerprint image/template. This is a driver and development document, Demo inside SDK, it will help you to develop.