When you’re sitting outside at a restaurant, with eight other people chatting and the baby monitor is on the table, not pressed up against your ear, the only sound from it you’re likely to notice coming from it is a wailing child IMO
So a baby monitor is just to assuage the parents' conscience?
'New from JML. Are you out on the lash with some mates? How about on holiday, but looking to reprise the frivolity of previous holidays and previous nights without the social stigma of leaving the kids unattended? Then you need Conscience Assuager (c). Conscience Assuager (c) will give you a false sense of peace of mind, while giving the illusion of responsible parenting. Appear to listen to your kids at the dinner table* while the rest of the party have to cobble together a checking regime - you just sit there, smug as a you like, quaffing and scoffing.
Never leave home without it - literally!
*up to 50m radius. Not to be used as an actual monitor. Kids may not necessarily be heard. Relatively pointless as an actual monitoring device.