Features: This product is a-dedicated fingerprint corrector for phone, used for optical fingerprint correction. The operation can be done in 1-minute, which effectively solves the problems of missing fingerprints after restarting, unable to enter normally, and unable to unlock normally after entering. The operation will be completed in one-minute. An effective way to restart the-lost fingerprint. A-general tool for isooptical fingerprint calibration. Specifications: Material:ABS Length:Approx.7.2cm/2.83inch Type:RL 071B Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks for your understandings. Package includes: 1 Set Fingerprint Calibrator