Asking because you typically can't stream from the camera. It eats battery fast. There are lots of cameras that allow you to transfer files over wifi. And several others that can transfer files via Bluetooth. It is a convenient workflow, but not a great one. There are cameras designed as security camera that can stream over wifi, but most of them are poor image quality. Many of the higher quality security cameras either require a physical connection or use a proprietary protocol.
All of that said, a phone or tablet camera is probably the best answer to your question.