Mini PCIe (Peripheral Component Interconnect Express) is a small form factor expansion card interface that offers several advantages over other interfaces:

Small size: Mini PCIe is designed to be compact, which makes it suitable for devices with limited space, such as laptops and small form factor desktops.

High speed: Mini PCIe supports high-speed data transfer rates, which makes it ideal for use with devices that require fast data transfer, such as wireless networking cards, solid-state drives (SSDs), and graphics cards.

Power efficiency: Mini PCIe is designed to be power-efficient, which makes it ideal for use in portable devices that rely on battery power.

Standardization: Mini PCIe is a standardized interface, which means that it is widely available and compatible with a range of devices.

Flexibility: Mini PCIe supports a range of different peripherals, including Wi-Fi cards, Bluetooth cards, SSDs, GPS modules, and more. This makes it a versatile interface that can be used in a variety of different applications.

Antenna connectors: These modules come with antenna connectors, usually in the form of small coaxial connectors. The antennas are used to transmit and receive wireless signals, ensuring proper reception and transmission of data.

Compatibility: MiniPCIe WLAN modules are compatible with devices that have MiniPCIe slots. These slots are commonly found on laptops, small form factor desktop computers, and embedded systems. However, it's important to note that MiniPCIe slots are not as prevalent in modern laptops as they used to be, as newer laptops tend to use smaller M.2 slots for wireless modules.

Upgradeability: One of the advantages of MiniPCIe WLAN modules is their ability to be upgraded or replaced. If a device's wireless capabilities become outdated or require improvement, the MiniPCIe WLAN module can be swapped out for a more advanced module without replacing the entire device.

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DR900VX

https://www.wallystech.com/Network_Card/DR900VX-Qualcomm-Atheros-QCA9880-3T3R-MIMO-802.11ac-Mini-PCIe-Wi-Fi-Module-Dual-Band-2-4GHz-5GHz.html

Qualcomm-Atheros QCA9880 chipset

 2.4GHz max 26dBm & 5GHz max 25dBm output power

 IEEE 802.11ac compliant & backward compatible with 802.11a/b/g/n

 3x3 MIMO Technology, up to 1.3Gbps

Mini PCI Express edge connector

RoHS compliance ensure a high level protection of human health and the environment from risks that can be posed by chemicals

Supports Spatial Multiplexing, Cyclic-Delay Diversity (CDD), Low-Density Parity Check (LDPC) Codes, Maximal Ratio

Combining (MRC), Space Time Block Code (STBC)

Supports IEEE 802.11d, e, h, i, k, r, v time stamp, and w standards

Supports Dynamic Frequency Selection (DFS)

FCC,CE and IC Certification