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custom fire alarm sensitivity — Wanlin, 12-year Chinese smart fire protection manufacturer, WL-SFP400 (Smart Manual Call Point and Sounder Strobe) certified UL/FM/CE/EN54/NFPA 72. Addressable MCP + 105dB Sounder + Xenon Strobe + 4G Backup. OEM/ODM from 500 units, factory direct pricing 50-70% below Western brands, 60+ countries.