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Factory Price Loud Speaker OEM 3W-6W Fire PA Ceiling Speaker with Cover. OEM Service Acceptance: We accept OEM service and welcome ODM product choices. Wide Application Scenarios: Suitable for schools, hotels, shopping malls, airports, stations, and stores. High Sensitivity: Features 90dB sensitivity for clear sound output. Standard Voltage Input: Compatible with 70V-100V AC input systems. Durable PP Material: Constructed with high-quality PP material for longevity. Compact Installation Size: Installation size of 185mm fits standard ceiling mounts. Fast First Batch Delivery: First batch can be delivered within 7 working days. Quality Assurance Process: Includes pre-production samples and final inspection before shipment.