All watches are sold as is and there are no guarantees or warranties since they are all used. They have been tested, but only for a short period of time. There could be issues that went unnoticed during the time of the testing. If unable to test the item there is a possibility of the item having an unknown defect. The functions (digital watches) work but I cannot guarantee the accuracy. Some scratches may not show up on camera. May not be water proof - if a new battery has been installed the watch will not be waterproof again until pressure tested.