APAC 400GBASE-LR4-10 optical transceiver is a high-performance solution for 400 Gigabit Ethernet links on up to 10km over single mode fiber (SMF). It combines 8x 26.5625 GBd PAM4 electrical lanes into 4x 53.125 GBd PAM4 optical channels in compliance with 100G Lambda MSA 400G-LR4-10. Using cooled EA-DFB-LDs each at a CWDM 1.3 µm wavelength and 4x PIN PDs.

Features and benefits:
 400GBASE-LR4-10 compliant
o 4x 53.125 GBd PAM4
 400GAUI-8 compliant
o 8x 26.5625 GBd PAM4
 QSFP-DD MSA compliant
 LC duplex connector
 CMIS 4.0 management interface
 Power consumption <12 W

https://www.apacoe.com.tw/en/product-706871/Optical-Transceiver-400G-QSFP-DD.html