Black Silver USB Rechargeable Door Smart Lock Fingerprint Padlock Quick Unlock Zinc Alloy Metal High Identify Security Lock Color:Black An easy-adjustment resistance knob is

An easy-adjustment resistance knob is integrated directly into your exercise bike's frame

Ab Crunch: yes

Professional design

Power supply: 5 V

Black Silver USB Rechargeable Door Smart Lock Fingerprint Padlock Quick Unlock Zinc Alloy Metal High Identify Security Lock Color:Black An easy-adjustment resistance knob isBlack silver USB Rechargeable Door Smart Lock Fingerprint Padlock Quick Unlock Zinc alloy Metal High identify Security lock Frequently Asked Question 1. How to do if the fingerprint can't be identified? Usually due to fingerprint wear, peeling, scratches, dirty, wet fingers, or fingerprint collection window with smudginess and water droplets, fingerprint identification is not successful. It is necessary to ensure that the fingers and fingerprint