There are PC version and mobile phone version of the nail. If you want to sign, you must have an electronic signature board of King Hua. If signing a contract on a mobile phone, the mobile phone must be an OTG-enabled mobile phone with Android 6.0 system or above.

Here is the electronic signature board of King H430P as a demonstration.

Mobile phone version nail

Turn on the OTG function of the mobile phone (some mobile phones can be ignored by default), plug in the electronic signature board of King H430P, and open the file you want to sign for signature.

PC nail

The computer must be a Windows 10 system. The computer is connected to the electronic signature board of King H430P. Open the file you received on the nail with Microsoft Word, and then click Review to start ink writing, and you can sign it.