As a retail store owner, I am happy to have found this industrial and scientific sign for cell phone use. It is well-designed, sturdy, and comes at an affordable price. As a result of using this product i found that there are less distractions for my employees and increased productivity. The sign is clear and easy to read, which has minimized the amount of disputes with customers. The only downside is that it may not be effective for customers who are visually impaired. Overall, I highly recommeSee full review