All the coils are produced by ourselves, so we can control the quality, both aluminum & copper mixed coil and pure copper coil are available for your choice.

Enclosure color can be as per your requirements.

Both LCD display and Analog meter display are available for your choice.

Before leaving the LINGFRAN factory, every automatic voltage stabilizer/regulator must pass a series of rigorous tests, performed with advanced equipment, on a range of measurements. 
(1) Appearance – visual check.
(2) Input voltage regulation range, output voltage and output accuracy.
(3) Insulation resistance and withstand voltage strength .
(4) Protection Function: Over voltage, under voltage, short circuit.
Below are part of our testing instrument.