The FRMDC99 is a DC wall controller suitable for use with most ceiling fans that have a DC motor. It can be used for fans with or without a light, with multiple functions to offer. Features: FAN ON & OFF 6 speed settings with light indicator LIGHT ON & OFF Dimmable 4 pre,set colour temperatures: Warm white Neutral white Cool white Daylight white Consistently changeable colour temperature 1, 4 & 8 HR TIMER 12 Month Warranty Summer/Winter FeaturesTo change the ceiling fan's Summer/Winter operation, use a flathead driver to open the wall controller's cover from the bottom. Then, a small switch will be visible in the centre of the controller with initials 'S' and 'W'. Change the dip switch to whichever preferred mode. Specifications: Rated input voltage: 220,240V~ Rated input frequency: 50Hz Battery: 2 x 12V A23 type (included) Frequency: 433.92MHz