Which extended cellular modem antennas have been tested with Nodegrid appliances

This extended cellular modem antenna has been tested by ZPE with the cellular modems used in Nodegrid appliances successfully:

Magneto MB.250.B Three Way Base Mount for LTE or Wi-Fi MIMO 2*2 antennas

ZPE Systems also resells these via SKU: MB.250.B

Yagi Directional Antenna 3G/4G/LTE 9dBi 800MHz-960MHz and 1.7-2.5GHz SMA Male cable to TS-9 adapter

These products can be purchased directly through the manufacture or their authorized resellers.