Ultra-low power consumption Liquid Level Measurement by Ultrasonic technology Measure through container, No need to contact Liquid Multiply Sampling and one uplink Support Bluetooth v5.1 remote configure and update firmware Uplink on periodically Downlink to change configure IP66 Waterproof Enclosure 8500mAh Battery or Solar Panel Li-on Battery for long term use Nano SIM card slot for NB-IoT SIM
