What is the 10Gtek QSFP-100G-SR4?
The 10Gtek QSFP-100G-SR4 is a QSFP optical transceiver module, listed by the manufacturer as "100GBASE-SR4 QSFP100 transceiver, up to 70m over parallel OM3 or 100m over OM4 multi-mode fiber.". It is part of Circular Telecom's surplus and refurbished telecom/IT equipment inventory.