(A-2) Narrowband IoT (NB IoT), also known as LTE Cat NB1, is a Low Power Wide Area (LPWA) technology that works virtually anywhere. It connects IoT devices more simply and efficiently on already established mobile networks, and handles small amounts of fairly infrequent 2 way data, securely and reliably. NB-IoT sensors and devices are battery powered which last for 3 or more years and are connected to the IoT platform through the mobile network which allows the customers to have very minimal installation to save cost.