Mantra mBio-16 2.8 inch Time Attendance Terminal is a great product for those who are looking for a reliable and accurate biometric machine. It is easy to use and comes with a user-friendly interface. The Mantra mBio-16 biometric machine is a security device that uses your fingerprint to identify you. It has a operating temperature of 0-60 deg C and a display type of TFT. The display size is 2.8 inches. The communication type is TCP/IP & USB. The voltage is Adapter: 9 V DC.