Worked fine in our production of baby.
It feels like a holding a phone from the 60s/70s! It's not cheap plastic--has a nice heft to it just like the old phones did. The mouth piece is the newer style smaller plastic cased voice coil. Look and feel of an old-fashioned telephone receiver.
And it is awesome. For anyone who grew up using a regular handset, you forget how functional a handset was. The idea of this piece of tech is great.
It feels sturdy, not like it was cheaply made. It is high quality, made like the old school handsets, so it has some heft to it. Only complaint is the cord feels thin and flimsy.
The microphone has its wiring covered over with hot glue. After 3mn listening to a message, my ear feels numb/as plugged.
These people are jerks. Great idea - not good performance. But functionally, it really needs improvement. Also uncomfortable. It's also pricey.