Purchase with Trust - UK eBay Seller since 2001\n100% Satisfaction Guaranteed   |   FREE Click & Collect   |   Fast & FREE UK Delivery   TP-Link Omada 1000Base-BX WDM Bi-Directional SFP Module - (TL-SM321B-2)(TL-SM321B-2)Item ConditionNew, sealed and boxed.Fast DeliveryAll items usually shipped same day on a tracked service.Click & CollectOption on checkout to deliver to a local collection point.Return Policy\nNo quibble 60 days return policy and 3 year warranty on all Refresh Cartridges branded products.Description  |  UK Shipping  |  International ShippingDescriptionThe TP-LINK TL-SM321B-2 is a 1000Base-BX WDM Bi-Directional SFP Module, designed for efficient and high-speed communication over single-mode fiber. It supports a transmission distance of up to 2 km and features Digital Diagnostic Monitoring (DDM) for performance optimization. The module is hot-swappable, ensuring easy installation and maintenance.\n\nSpecification.