GTM1: Cooling automation controller. Cellular temperature alarm system 2G 3G 4G LTE. FREE APP.

Free App: https://play.google.com/store/apps/details?id=com.sera.cloud
More information via email: info@topkodas.lt
Website: https://www.topkodas.lt/
Skype name: topkodas

Cellular 3G 4G LTE version is available
2G/3G/4G networks worldwide:
Europe
North America
Carrier: USA: AT&T, Rogers, T-Mobile, Canada: Chatr Mobile. Module Bands: 4G – FDD-LTE:B2/ B4/ B12, 3G-WCDMA:B2/B5.
Australia
South America
Other regions

source

4g lte