Explain in detail what's a hardware password manager?

Dashlane + Yubikey could be a solution for you if you need to work with the Hardware password manager. Another possibility would be HushioKey and Hushio ID Lock app: Hushio ID Lock is Android password manager app and it can Bluetooth pair with HushioKey (plugged into a computer and simulates a USB keyboard and more) to avoid any password tying.

• BASELINE (non-negotiable) REQUIREMENTS:
  
• AES256 encrypted. No clouds.
  
• PIN and/or fingerprint login.
  

Can backup to an old Android device per your choice. Backup and restore can only happen in your pre-specified location (A.K.A trusted location, like your home).

FEATURE REQUIREMENTS (really, REALLY want these, too):

1. Can generate randomized passwords for new accounts
   
2. Can send a password to your computer via encrypted Bluetooth 4 connection. Just long tap an account icon. No typing.
   
3. Can turn your smartphone into a U2F token. Just reach your HushioKey with your phone.
   
4. Location-aware security. Auto self-lock after detecting not in the trusted location for a certain period of time. Unlock by entering trusted-location again. Temporary trusted location available for trip/vacation.
   
5. Sorry but no FIPS 140-2 Level 3 compliance test yet.
   
6. Demo of HushioKey Laptop login: https://youtu.be/wzGs_17XUkM
   
7. Demo of HushioKey U2F authentication: https://youtu.be/DGzU0OltgF4
   

https://www.hushio.com