Description Litter-Robot 4 Cat Presence Sensor Designed for Litter-Robot 4 Monitors the waste drawer effectively Available for replacement purposes Requires installation after purchase Enhanced with motion sensor technology The Litter-Robot 4 Cat Presence Sensor is a motion sensor specifically designed to monitor the waste drawer of the Litter-Robot 4. It is available for replacement purposes. Please note that installation is necessary after purchase. View more What's Included 1x Litter-Robot 4 Cat Presence Sensor Links Website Specifications For Litter-Robot 4 models only Installation required