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wireless gas alarm user manual direct from Wanlin Fire Protection — 12-year factory experience, WL-GA208 fully certified CE/EN54/FCC/RoHS. Key specs: 4G + WiFi + Zigbee + Bluetooth 5.0, Unified management of 50+ gas safety devices with cloud platform and multi-channel alerts. MOQ 100 sets, 20-25 working days, OEM/ODM custom branding available. Serving 60+ c···