ZK4000/ZK4500 is a stable and excellent fingerprint reader. The device can capture fingerprint image and upload e to the PC by USB interface.  ZK4000/ZK4500 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/ZK4500 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.