The shape of the hemisphere makes it easy to notice. So if there is an emergency in the room, it can be easily noticed. Warn with 5 different colors. The color depends on the call. Flush on doors. If not suitable, it can be mounted with a surface mounted box. Maintenance-free technical support plug and play architecture. High-level performance with its built-in antenna. You have 3 different main colors (blue, green, red). Ability to achieve different warning colors by mixing primary colors. Very low energy consumption and friendly to the environment thanks to its LED design.