1.NB-IoT water meter, based on narrow band internet of things technology. 2.Power: 26500+SPC1520 type battery, external installed for easily replacing. 3.Low power consumption, lifespan of battery is more than 6 years. 4.Uploads data on the lock time once a day（set on software platform）. 5.Uploads data by manual activating out of the lock time. 6.Communication Contents: Accumulating amount of water consumed, remaining balance, voltage of battery, valve status(open or close), interfere by magnetic and it’s times, control valve , prepaying credit.
RF Card Functions 1.Prepaying credit by RF card. 2.Early Warning: When the remaining balance reach 2¥(set according to user's requirement), the valve promptly closes, reminding users to buy water as soon as possible; at this time, the valve can be opened by sweeping the RF card. 3.Cleaning valve for moving smoothly by closing and opening valve automatically once a month or twice a month. 4.Low-power Warning: When the power is insufficient, the LCD displays it, prompting repla- cement of battery timely. 5.Close Valve when Low-power: If the battery is not replaced in time after low-power warning, the valve will close and will open after replacing battery. 6.Checking Readings: It will display the remaining balance and the accumulating amount of water consumed, price, etc. when sweeping RF card. 7.Anti-plugging Function: The program automatically cleans the valve(by closing and opening) once a month to avoid valve plugging. 8.Stepped Pricing:3 steps price monthly. Return to first step at the beginning of every month. 9.Self-service charging terminal: It is available for easy to charge nearby and at all day time. | 
