Amazon.com: 10GBase-ER SFP+ Transceiver, 10G 1550nm SMF, up to 40 km, Compatible with Cisco SFP-10G-ER, Meraki, Ubiquiti UniFi, Mikrotik, Netgear, D-Link, Supermicro, TP-Link, Broadcom, Linksys and More. : Electronics
Cisco 10GBASE-ER SFP Module Ent Class (SFP-10G-ER-S)
Cisco SFP-10G-ER SMF Long Haul 40km10Gbase SFP+ Transceiver Module