| Model Name | DDSY/U353 |
| Model | Single Phase Smart Meter |
| Voltage | 220V |
| Current | 5(60)A |
| Accuracy | 1 |
| Frequency | 50-60Hz |
| Pulse constant | 1600imp/kWh |
| Display | LCD 6+2 |
| Power consumption | <2W/10VA |
| Load control | Magnetic relay |
| Low balance indicator | Fre-Green indicator on the left LED: sufficient balance |
| Flashing indicator | Insufficient balance |
| Network anomaly indication | GPRS LED indicator on: the network is normal |
| GPRS LED indicator flash or off: network abnormality |
| Starting current | 0.4%Ib |
| Temperature range | -20～70℃ |
| Communication | GPRS/RS485 |
| Protection | overload protection |
| Net weight (kg) | 350g |
| Product size | 100x76x66mm |
| Certificate | IEC62052-11；IEC62053-21；IEC62055-41；GB/T 17215.321；GB/T 17215.301 |
