This document provides specifications for a 25G 1330nm 10km SFP28 transceiver module. The module operates at 25.78Gb/s and uses a 1330nm CWDM transmitter optimized for 10km single-mode fiber links. It complies with relevant IEEE and SFF standards and has features such as hot-pluggability, low power consumption under 1.5W, and a case operating temperature range of 0-70°C. Electrical, optical, mechanical and ordering information is included to describe the product in detail.