Ultra-low power consumption Distance Detection by Ultrasonic technology 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 Built-in 0.9w Solar Panel/3000mA Li-on battery for long term use Nano SIM card slot for NB-IoT SIM
