I charged them up, linked them and tested them fully good condition

Stay connected with your little one with this VTech baby monitor set. With features like portable design, volume control, battery warning, light indicator, and out of range indicator, you can keep an eye on your baby even from a distance. The digital display shows crystal clear video and audio, making it easy to monitor your baby's movements and sounds. This three-piece set includes two parent units, ensuring that both parents can stay connected with their little one at all times.