1) Change The Frequency of Your Device Wireless devices such as baby monitors are created to have the ability to change frequencies. This ability of these devices can help in resolving any interference problems. If you think this is difficult to do, think again. It can be as easy as just flicking a simple switch on the device. Sensory monitorsdetect the baby s slightest movements even during sleep. It fits under the mattress of the baby and alarms you when the baby stops moving or is absolutely still for 20 seconds. Some models available also come with audio monitors installed. These come with a portable parent s unit that sends you the alarm and allows you to hear your baby s activities. Heart Beat Monitor This feature is a must for the device that you will choose since no apnea monitor is 100 percent accurate in detecting cessation of breathing. This will serve as a backup in case the apnea monitor fails to detect apnea because it will also manifest in the heart rate of the baby. Another must have feature is a remote alarm. Sound-activated Light It can be difficult to monitor baby sounds if you're trying to vacuum the floor or watch television. Fortunately, a number of baby monitors now come with a sound-activated light that illuminates each time it detects noise. This feature allows you to immediately know that something's going on without even hearing the sounds. Since it is wireless, the limitation that the length of wires provide does not apply to it making it more possible to move around the house while still being able to monitor your baby. Almost all types of monitors, whether audio or video, can be wired or wireless. It all comes down to budget and preference. Types of Baby Monitors Baby monitors have evolved through the years. From the simple transmitter and receiver device, different baby monitors have been developed. Currently, there are two types of baby monitors: video baby monitors and audio baby monitors. Video baby monitors, as the name implies, use video footages for overseeing events in the room where the baby is located.