We often recommend a Signolux Baby Monitor (portable) which contains a Receiver, a Vibrating Pad, an Audio Transmitter, a Plug-In Microphone and Mains Power adaptor.
The Transmitter can be used to pick up audio signals from a baby crying, and has a sensitivity control, so you can set it to the strength of your baby’s cry.
It is portable for use throughout the home or can be wall mounted. The system has an operating range of up to 200 metres. The receiver has 8 different indicators meaning that you can be alerted to different events within the home by adding different transmitters to the system.
The receiver will alert you using very loud selectable chimes (>90dB), a bright flashing light and also visual indication symbols.