Features AUTOMATIC OPENING AND CLOSING: Smart sensors are not only economical, but also part of a growing product line compatible with your water level monitoring sensors. Automatically turn water off or on during high or low water level detection, turn pumps on or off, activate alarms and lights WIRELESS AND CONVENIENT: The water level sensor is wireless and battery powered, with ultra long range wireless(up to 100M in the open air), so you can place the sensor where WiFi and older RF technology cannot reach, without cables, conduits, pipes, ditching or electricians WITH TEMPERATURE SENSOR: The power supply voltage range of the pump control box is AC110‑230 V, and can also monitor temperature changes, which can effectively target liquids requiring specific temperature storage, such as red wine. The transmitter is Water-proof IP65, effectively preventing rain from splashing from any direction TRANSMITTER SOLAR CHARGING: Ultrasonic water level sensor is assisted by solar panels and has charging function for rechargeable battery. The use of NiMH rechargeable battery can reduce the number of times to replace the battery to a certain extent. Save battery use cost, please install the solar panel on the sunny side, when there is light, can provide power and charges the rechargeable battery APPLICABLE SCENARIO: Ultrasonic liquid level meter is widely used in monitoring and automatic control of container water level system, and can be used to monitor the storage capacity of liquid level in containers such as boxes or tanks. Simple installation, easy to use Specification: Item Type: Ultrasonic Level Sensor Material: ABS Receiver: 3 x AAA batteries(single 300mAh built in) or DC 5V power cord Transmitter: 6 x AAA Ni MH batteries(single 150mAh built in)(with built in solar panel for automatic charging when exposed to sunlight) Water Pump Control Box: AC110-230 V Transmission Frequency: 433Hz Wireless Transmission Distance: 100m in open area, 30m effective Product Features: 1. Water pump control box automatically adds water at low water level 2. Backlight on or off function 3. Time function in 12H/24H format(default display on startup: 0: 00 24h) 4. Transmitter low battery reminder 5. Alarm function(default display on startup: 0: 00) 6. Buzzer on or off(buzzer function only affect button sound, not alarm sound) 7. Indoor temperature in ℃ or ℉(default ℃) 8. Data signal indication 9. Water tank temperature in ℃ or ℉(default ℃) 10. Water pump control box power output indication 11. Water Tank Level Display Unit: Meters or feet(default: meters) 12. Low water level icons display 13. Water depth simulated display on a 10 elements LCD bar graph 14. Water Pump Control Box Operating Voltage: AC110-230 V(pay attention to L, N polarity when inputting power, output voltage equal input voltage, output load current should not exceed 10A) 15. Receiver Indoor Temperature Range: 0℃-50℃/32℉-122℉ PackageList: 1 x Transmitter 1 x Receiver 1 x Pump Control Box 1 x Power Cord 3 x Screws 1 x User Manual Package List 1 x Transmitter 1 x Receiver 1 x Pump Control Box 1 x Power Cord 3 x Screws 1 x User Manual