Cellular GSM, LTE, WCDMA RF Transceiver Modules 850MHz, 900MHz, 1.8GHz, 1.9GHz

Protocol: GSM, LTE, WCDMA modulation
frequency: 850MHz, 900MHz, 1.8GHz, 1.9GHz
data rate: 150Mbps
antenna type: Antenna not included
Voltage supply: 3V to 4.2V
operating temperature: -40°C to 85°C

The top side is designed for M.2 key B 2242 cards. 3042 are fine too, but are wider than the U101B.

The bottom side is designed for M.2 key E 2230/2242 cards.

It has an integrated 4 port USB 2.0 hub (only 2 ports used).
It has a Flat bottom....

Designed for 4 M.2 cards, 2 on top and 2 on the bottom.

1. M.2 key B 2242/3042 card

2. designed for M.2 key E 2230/2242 cards.
3. designed for M.2 key E 2242 cards.
4. designed for M.2 key E 2230 cards.

M.2 cards are mounted with M3 screw. It has an integrated 4 port USB 2.0...