A Video Baby Monitor is a wireless monitoring system used to remotely listen and watch an infant. The transmitter, equipped with a camera and a microphone, is placed near to the child and the receiver equipped with a monitor and speaker, is carried by, or placed near to, the person caring for the infant.

Some video baby monitors are bi-directional(two-ways), using transceivers that allow the caregiver to speak back to the baby (parent talk-back). Some allow music to be played to the child. 

An Audio Baby Monitor, also known as a baby alarm, is a radio system used to remotely listen to sounds made by an infant. The transmitter, equipped with a microphone, is placed near to the child and the receiver equipped with a speaker, is carried by, or near to, the person caring for the infant. Some baby monitors are bi-directional, using transceivers that allow the caregiver to speak back to the baby (parent talk-back). Some allow music to be played to the child. 

There are two major types of Walkie Talkie. One uses the standard PMR/FRS frequencies (446/462MHz) for the European and USA markets respectively. Another type uses the 40/49MHz frequencies commonly used in Europe and the USA. The efective communication range for these Walkie Talkies can be from 100 Meters to 3 Kilo Meters.

Digital Audio Door Bell(JY-738) is a new product line introduced by JOYO in 2011. This product utiilizing the lastest DECT technology including ECO and NEMO functions that meets the most current health requirements on Radio Frequency products among most EU countries.