Schneider Electric Merten rotary dimmer MTN5140-0000 is a is a 2-way universal rotary dimmer. And the control type of this rotary dimmer is turn and push-button. Being made of metal, plastic material, this rotary dimmer is quite reliable and resistant. With the maximum power allowed of 9...100VA. It is 74 mm in width, 74 mm in height, 60 mm in depth In addition, the rated operational voltage of this device is 230V. The device's fixing mode is by screws and claws. Its matching mounting box can be recessed into the surface of the wall with flush type. The protection type is fuse protection, improving safety level. This rotary dimmer is SVHC (substances of very high concern) free too. It reaches IP20 degree of protection too. Besides it is halogen free halogen free, which is good for your health. What's more, this device is qualified as a green premium product, with minimal use of hazardous substances. And it is mercury free