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price smoke detector test kit heat detector tester portable smoke tester facility management fire detector tester Warehouse industrial smoke sensor Accessories solution digital signage player mounting bracket Wanlin technology China export smart display system digital advertising streaming media Android platform OEM partnership ODM service global deployment certified device HDMI connectivity 4K playback commercial hardware media signage enterprise display content ecosystem smart factory display innovation IoT media video management signage CMS manufacturing quality factory direct supply PIR kitchen sensor mmWave stove detection for HVAC systems smoke alarm tester OEM smoke tester EN54 compliant detector calibration Application Scenarios solution TV stick as OE with display fire detector tester global stove safety partner unatten Smart Features solution smart TV stick AirPlay receiver Android stove alarm wholesale d China fire safety manufacturer CE LVD EMC fire protection deployment W 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