Features: NB-IoT Bands: B1/B2/B3/B4/B5/B8/B12/B13//B18/B19/B20/B25/B28/B66/B71/B85 CAT-M1 / LTE-M Bands: B1/B2/B3/B4/B5/B8/B12/B13/B18/B19/B20/B25/B26/B27/B28/B66/B85 Ultra-low power consumption Upload water flow volume Door Open/Close detect Door open/close statistics Multiple Sampling and one uplink Supports Bluetooth v5.1 remote configuration and firmware updates Uplink via MQTT, MQTTs, TCP, or UDP Uplinks on periodically Downlink to change configuration 8500mAh Battery for long term use (CPL03-CB) Solar panel 3000mAh Li-ion battery (CPL03-CS) Nano SIM card slot for NB-IoT SIM
