AJMRTC M.2 B Key WWAN 4G LTE Module Adapter Card, NGFF M.2 B-Key to USB-C Expansion Board with Dual TF / Dual Nano SIM Slot, Compatible with 3042 & 3052 WWAN 3G/4G/5G Communication Module

AJMRTC M.2 B Key WWAN adapter expansion card is made for NGFF Socket 2 WWAN LTE cellular modules. It accepts 3042 and 3052 form-factor M.2 B-key 3G, 4G or 5G wireless communication modules and outputs a standard USB-C port, so you can connect the cellular module directly to PCs, single-board computers, routers and embedded hosts without laptop internal slots.

It features dual independent Nano SIM / TF card slots. You can swap between two different mobile network carriers conveniently, perfect for network failover testing, cross-carrier comparison and industrial IoT deployments. The PCB layout is optimized for signal stability and anti-interference, maintaining reliable cellular connection under continuous long-time operation.

The onboard LED power indicator lets you quickly verify whether the module receives power normally, helping you diagnose loose contact or power issues. It draws power directly from the USB-C bus without extra DC power supply. It is widely used by repair technicians, IoT developers and network hobbyists for WWAN module testing, custom 4G router construction and mobile communication embedded system development. Important Note: This adapter is for WWAN cellular modules only. It is NOT compatible with M.2 SATA or NVMe SSDs, WIFI-only M.2 cards.

Specifications

1. Brand: AJMRTC
2. Host Slot: M.2 NGFF Key B (Socket 2 WWAN)
3. Output Port: USB-C
4. Supported Module Size: 3042, 3052
5. Card Slots: Dual Nano SIM / Dual TF card slots
6. Supported Module: 3G / 4G LTE / 5G WWAN cellular communication module
7. Power Supply: USB bus powered
8. Indicator: LED power status light
9. Installation: Plug and Play
10. Application: Module testing, DIY 4G router, IoT embedded host, industrial communication system