SUMRING is issuing a product lifecycle update for B2B distributors, wholesalers, installers, contractors, and trading partners. The SR-820DHR Wireless 433 Smoke & Heat Detector has been discontinued. At present, approximately 400 units remain in stock, and availability may change quickly as existing inventory is allocated. For customers who still require the SR-820DHR for existing orders, replacement projects, or channel inventory, we recommend confirming stock before placing a purchase order. Once the remaining inventory is sold, this model will no longer be available for regular supply. A Replacement Is Available for New Inquiries To support continuity for ongoing customer inquiries, Sumring can now recommend a current wireless 433 smoke & heat detector with the same core application: combined smoke and heat detection with 433 MHz wireless communication. For existing installations, follow our 433MHz smoke and heat detector replacement guide to check the installed host, run a sample pilot, and plan a phased rollout before approving the new model. This replacement provides distributors, installers, project contractors, and trading companies with a practical alternative when the original SR-820DHR is no longer available. For distributors and contractors evaluating replacement options, choosing a new wireless detector requires more than matching the 433MHz frequency. RF protocol......

As China’s National Day approaches, SUMRING would like to thank our global distributors, wholesalers, fire alarm contractors, installers, project buyers, and trading partners for their continued trust and cooperation. Our China National Day holiday will run from October 1 to October 7, 2026. During this seven-day holiday period, production and shipment schedules may be temporarily adjusted. Customers with upcoming fire alarm projects, replenishment requirements, customized products, or scheduled deliveries are therefore encouraged to plan orders in advance. 7-Day National Day Holiday — We Remain at Your Service Although our regular factory schedule will be affected during the holiday, our team will continue to provide online communication and customer support for project inquiries, quotation requests, product selection, and future order planning. From October 1 to October 7, we will remain dedicated to serving you. For time-sensitive requirements, please contact our team before the holiday so that production capacity, customization details, packaging, and shipping schedules can be coordinated earlier. Fire Alarm Products Available for B2B Projects SUMRING supplies a broad portfolio for distributors, contractors, installers, system integrators, and private-label buyers, including: IP67 waterproof manual call point covers, gas detectors, heat detectors, smoke detectors, fire alarm control panels, manual call points, beam detectors,......

Sumring will observe the 2026 Mid-Autumn Festival holiday from September 25 to September 27, 2026. During this period, our production and office schedule will be adjusted, while our sales team will remain available online to support overseas B2B customers with project inquiries, quotations, product selection, and customization discussions. For distributors, wholesalers, system integrators, contractors, and private-label brands, holiday timing can affect purchasing plans and project schedules. To help customers prepare in advance, we recommend confirming samples, specifications, packaging requirements, and production arrangements before the holiday whenever possible. Fire Alarm Products for Global B2B Markets Sumring continues to supply a broad range of fire alarm and safety products for export markets. Key product lines include IP67 manual call point covers, gas detectors, smoke detectors, fire alarm control panels, sounders, strobes, and related fire safety accessories. Sumring’s current product portfolio and manufacturer information also emphasize OEM/ODM support for international customers. Our IP67 manual call point cover range includes private-mold designs developed for outdoor and demanding installation environments. Selected products support branding, customized installation sizes, customized packaging, and ODM cooperation, helping distributors and project contractors build differentiated product lines. Internal link: IP67 Manual Call Point Cover for Outdoor Fire Alarm Protection Gas and......