Voltage adjustment: The default gear with switch is (0, 30.35.40...100, starting from 30, 5 steps per gear). 0-100% (220 volts, 100 levels of adjustment, non-linear) can be adjusted arbitrarily for electrical appliances. Such as: Oven controller, hot pot controller, heating tube temperature adjustment. So as to achieve the effects of dimming, temperature and pressure. Available for large appliances with an electric power of less than 5000 watts. Voltage: AC 220V Maximum Power: 10000W instantaneous limit power for resistive load. It is recommended to use within 5000W for a long time at room temperature. Colour:As Shown Material:PCB+electronic components+Plastic+Metal Package Contents: 1 x Thyristor voltage regulator 1 x Switch Panel 1 x Cable(the color of the connecting cable is random and cannot be specified.) Only the above package content, other products are not included. Note: Light reflection 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.