Baby monitors with Wi-Fi baby monitor signals can be affected by walls or floors. In general, you will lose about 50% of signal strength for every wall the baby camera is behind and 25% for each floor between the baby camera and parent device, but this may vary depending on your home layout. If you live in a multi-level house or have a large property that might interfere with baby monitor transmission, choose a baby monitor transmitting radio frequencies instead so it doesn't matter how many obstacles are placed between the baby's room and yourself!