Kaiweets HT100s Non-contact Voltage Tester

KAIWEETS Voltage Tester/Non-Contact Voltage Tester with Signal Percentage, Dual Range AC 12V/70V-1000V, Live/Null Wire Tester, Electrical Tester with LCD Display, Buzzer Alarm, Wire Breakpoint Finder (Amazon Affiliate)
US: amzn.to/3utzsPx
10% OFF Code：ZIP8F7ZG
15% OFF CODE: RM15
Available sitewide at Kaiweets.com
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[@HelmerandRawlins]

Thank you for the upload

[@randy6327]

Pardon my lack of knowledge, but what does a 99% reading mean?