Onboard precision miniature voltage transformer , The active phase AC output voltage transformer moduleOnboard precision op amp circuit, the signal sampling and appropriate compensation for precise functionsModules can be measured within 250V AC voltage, the corresponding analog output can be adjustedIt's brand new, good quality & high performance.PCB board size: 49.5x19.4 (mm)Specification:Material: metalColor: blueSize(LxWxH): . 50x17x20mm/1.97x0.67x0.79inchPackage Contents:1 piece Voltage Transformer ModuleOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.