ZKTeco ProBio Quick Start Manual page 3

Cautions on Using Face Recognition Device
1) Recommended Standing Position
a. Recommended Registration and Verification Position
b. Factors Affecting the Preciseness of Verification
Non-identical registration and verification
gestures
Non-identical registration and verification
distances from device
For user heights between 1.5m to 1.8m, it is recommended to
install the device at 1.15m above ground (may be modified
according to user average height).
Recommended Procedures (as shown in the left
image):
During registration and verification procedures, the
position of device should not be changed to
prevent deduction in verification preciseness. If it is
necessary to move the device, its vertical height
should not be changed.
Non-identical registration and verification
heights
Non-identical registration and verification
distances from device
2