We produce Non-power prepayment electricity meter, water meter, gas meter and heat meter. Following is the characteristic of them: Accuracy of measurement: the recorded data for the prepayment controller and the basic meter are completely the same. Steady and reliable operation: The meters keeping working without power, are not affected by anything external and the working life is the same as the ordinary basic meter. Work without batteries and have a low purchase price of just 1/2 to 2/3 of similar products.