Brand: HUAWEI Part Number: 02311BKT Product Category: Optical Transceiver Module: 40G-1310nm-40km-SM-QSFP-ER4 Data speed: 40G Media: SM Wavelength: 1310nm Reach: 40km Transceiver type: ER4 In addition to Huawei 02311BKT , Liyuan Tech has a wide range of other HUAWEI optical transceivers. If you have any need or interest, please feel free to send inquiry to global@chn-liyuan.com