The DECT Sound and Movement Baby Monitor is super-simple to use and comes with a clever talk back feature and night light enable you to soothe your baby from another room. The DECT Sound and Movement Monitor comes with a detachable sensor pad that fits under your baby's mattress and sounds an alarm if no movement is detected after 20 seconds for added reassurance. Movement sensor pad. Interference-free. Room temperature display. Long distance range of up to 300m. Out-of-range indicator. Two-way talk back. Baby night light controllable from parent unit.