ZK4000 is a stable and excellent fingerprint reader. The device can capture fingerprint image and upload e to the PC by USB interface. ZK4000 supports most of the Windows OS, including Window xp, vista and Windows 7(32bit). We provide developer with SDK. The developer can integrate the ZK4000 hardware with their own system. This product is widely used in social insurance, public security, time attendance, fingerprint encryption, embedded system and other fields of application.