W2 describes itself as a Polish manufacturer of fire alarm sounders and states that its products meet EN 54-3 for sounders and EN 54-23 for visual alarm devices, backed by current CNBOP-PIB documents. The register confirms eight valid świadectwa dopuszczenia in its name: 4839/2023 for the SA-P8 acoustic sounder, 4826/2023 for the SO-P8 optical sounder, 4884/2023 for the combined SAO-P8, 5301/2024 for the SA-K5, K6 and K7 range, 5376/2024 for SAOZ-Pk2, and 5963/2025 and 5964/2025 for the SGO-Pgw and SG-Pgw3 families. The firm opened its own test laboratory in 2015 and lists a portfolio of more than a hundred products. It is registered in the CNBOP list under the proprietor’s name at ul. Ceramiczna 1A, Kruszyn Krajeński.