Keychain:
- Set of 4 tire deflators
- NOT automatic (must check tire pressure as the tires are being aired down)
Single Pack:
- One tire deflator
- Automatic (can set desired PSI)
- PSI is NOT displayed on tire deflator. Must go through procedure to set to desired PSI
- Great if you only air down to one PSI (only air down to 18PSI for beach driving)
4 Pack:
- 4 tire deflators
- Automatic (can set desired PSI)
- PSI is NOT displayed on tire deflator. Must go through procedure with tire deflator attached to tire to set to desired PSI
- Great if you only air down to one PSI (only air down to 18PSI for beach driving)
4 Pack PRO:
- 4 tire deflators
- Automatic (can set desired PSI)
- PSI is displayed on tire deflator. Can set desired PSI without having to attach to tire.
- Great if you don't want the initial set up procedure or will be airing down to multiple PSIs (sometimes 18 PSI, sometimes 22 PSI, etc)