VF Series User Manual P a g e | 1The recommended distance between person and deviceshould be 0.5m (applicable to a height range of 1.5~1.85m).According to the obtained face image from device to adjust,when the face image is comparatively bright, please movebackwards appropriately; when the face image iscomparatively dark, please move forwards appropriately.1. Instruction for Use1.1 The distance, Facial Expression and Standing Pose Recommended distance:Some improper ways for Enrollment and Verification:Different posture Different heightToo close Too far Recommended facial expression and standing position:
