Fresh Air Intake Inline Filter Box With Pre-filter, Activated Carbon and HEPA filter For HVAC System to Intake Fresh Air

Does it include wireless functionality?：No Does it include a Battery?：No High-concerned chemical：None Model Number：YF-FB100 Origin：Mainland China Certification：NONE Name：Inline hepa filter box Material：Galvanized Steel Filters：Pre-filter, Carbon Filter, HEPA Filter Use：Supply Fresh Air Size：4/6 inch

Does it include wireless functionality?: No Does it include a Battery?: No High-concerned chemical: None Model Number: YF-FB100 Origin: Mainland China Certification: NONE Name: Inline hepa filter box Material: Galvanized Steel Filters: Pre-filter, Carbon Filter, HEPA Filter Use: Supply Fresh Air Size: 4/6 inch