Hybrid Offline/Online Windows POS System

I am in need of a hybrid POS system that operates both offline and online. This system needs to be compatible with Windows, and connect seamlessly to my event ticketing solution via database synchronization. It should have a simple touch interface, capable of managing shift start and end, printing shift details and tickets, and providing basic reporting. The ideal freelancer should have a pre-existing basic POS system ready for demonstration before we commit to the project.

Key Requirements:
- Windows compatibility
- Hybrid offline/online functionality
- Simple touch interface
- Shift management capability
- Ticket printing functionality
- Basic reporting features
- Pre-existing basic POS for demonstration
- Ability to connect to event ticketing solution via database synchronization