Yonglida Electronic Scientific & Technological Co., Ltd.
Tested energy meters of this manufacturer are listed below
| WO No | 2094126 |
| QUA/CAL | |
| Report No | 06-4021 |
| Country | China |
| Type | DDS54 |
| Class (Wh) | 1 |
| Elements | 1-phase |
| Wiring | 2-wire |
| Connection | Direct connected |
| Technology | Static (electronic) |
| Frequency | 50 |
| Current | 10(40) |
| Voltage | 220 |
| Register | Mechanical |
| Standards | IEC 62053-21 |