Supermicro SFP-10GLR-31-RFB is a refurbished optical transceiver for 10-gigabit SFP+ long-reach links. It is listed as a 10GB SFP+ LR module, intended for use in compatible SFP+ network equipment to connect an optical link.
The specified optical wavelength is 1310 nm. This identifies the LR variant and helps distinguish it from other SFP+ transceiver types. The item is supplied in refurbished condition; no additional package contents or device compatibility are confirmed.