BabySense 5 Baby Sensor Monitor Uses 2 high quality sensor pads which fit underneath your babies mattress, these pads measure and detect the rise and fall of your babies chest to detect the breathing. It uses a high pitch are to sound after 20 seconds without breathe to wake you and your baby.The alarm will also sound when the sensors detect less than ten movements per minute. The system is easy to install and you can use either one or two of the pads while the parent unit attaches directly to the cot itself.Motorola MBP10 Audio Baby Monitor uses a protected DECT signal that is interference free and offers the best quality sound possible, this signal also incorporates data encryption. The MBP10 high sensitivity microphone and interference free signal to monitor your baby in the best possible way. The MBP10 has a range of 300m and uses DECT technology to produce the highest quality sound.The MBP10 features and out of range alert and 5 hour battery life so you can monitor your baby wirelessly, there is also a sound level indicator as well a low battery alert for when it needs recharging.