1. There is no external IC card input to avoid human deliberate damage.

2. The prepayment system can also control with timing and amount of use.

3. Long operation life, interference-resistant, and attack-resistant.

4. Information transmission: As the information carrier, non-contact IC card (radio frequency) transmits about prepayment consumption, code and so on.

5. Real-time calculation: According to the amount of the prepayment and consumption, LCD module displays the real-time calculation of the balance.

6. Vocal-light instruction: Operation finishing, balance overflow could be instructed in vocal-light signals.

7. Automatically control on/off: According to the data of water prepayment and consumption, the valve of the water meter shall be auto-controlled on or off.