The Velux KLI 312 US keypad is for the operation of Velux motor powered (Blinds Only) and can be used for the individual operation of one motor powered blind or the simultaneous operation of several motor-powered blinds of the same product type using 1-way io-Homecontrol Rf signal. The Velux replacement keypad is a wireless installation and is used for open, close and stop functions of all Velux solar powered or electric skylight blinds. Can be used to replace KLI 110 us or KLI 310 US for (blind operation only) Battery powered wireless installation compatible with all Velux solar powered and electric motorized blind products. Wall mounted control pad for Velux brand products.