The Powerlink4 unit allows switch users to control up to two electrical appliances with single switches. Six unique modes of control allows you to define exactly how, and for how long, appliances will be turned on. Flexible outlets allow custom positioning of one or two appliances, activated independently. Linakble wireless technology is designed for use with multiple Big or Jelly Beamer switches. Two switch input jacks and an on-board display that lets you set the exact number of minutes or seconds of control.