DeLOCK Converter M.2 B+M-key - 1xGigabit LAN, low profile, PCIe 2.0, Realtek RL8111 Chipset, 0.2m cable
This converter by Delock expands the system by one RJ45 Gigabit LAN port. 
Specification 
• Connectors:
  1 x 59 pin M.2 key B+M male >
  1 x Gigabit LAN RJ45 female
• Chipset: Realtek RTL8111
• Interface: PCIe 2.0
• Form factor: M.2 2242
• Suitable for M.2 slot with key M or B+M based on PCIe
• Data transfer rate:
  Ethernet up to 10 Mbps (Half/Full Duplex)
  Fast Ethernet up to 100 Mbps (Half/Full Duplex)
  Gigabit Ethernet up to 1000 Mbps (Half/Full Duplex)
• Network specification:
  - Compatible with:
    IEEE 802.3: 10BASE-T
    IEEE 802.3u: 100BASE-TX
    IEEE 802.3ab: 1000BASE-T
  - Support Auto MDI-X (automatic detection of standard or crossover network cable)
  - Support IEEE 802.3az (Energy Efficient Ethernet)
  - Support full duplex operation with IEEE 802.3x flow control
  - Supports IEEE 802.1P layer 2 priority encoding
  - Supports IEEE 802.1Q insertion und removal
• Supports Jumbo Frame up to 9k
• LED indicator for power and Ethernet connection
• Cable length without connectors: ca. 20 cm 
System requirements 
• Windows 7/7-64/8.1/8.1-64/10/10-64, Linux Kernel 3.19
• One free M.2 key M slot 
Package content 
• Converter
• Low profile bracket
• Driver CD
• User manual