Designed for odinary Prepayment Rsidential Customer DDSD101-KS1Single Phase Plug-in Keypad Prepayment Ellectricity MeterDesigned for Ordinary Prepayment Residential Customer1.Measure active energy,minimum measurement unit :0.01Kwh2. LCD display instantaneous voltage and current, and with backlight3.20-digit transmission as a token,customer purchases energy before consumption4. Low energy alarm5. ...