The supplier fixed the issue for us.

I recently purchased an A4 size Switch Glass Film, also known as Smart Glass or PDLC Film. The product quality is impressive, offering privacy on demand with a simple switch, and I'm quite satisfied with its performance. The delivery was exceptional, arriving sooner than expected, securely packaged to ensure perfect condition. The quality and functionality of the film are good, with flawless switching between transparency and opacity. The design is sleek and integrates well with any setting, indicating thoughtful consideration in its creation. Customer service was commendable, with a responsive and helpful team. Overall, a pleasing experience with the Smart Glass Film.