Mine shows location [GPS] time, date, speed of my car and registration plate. I believe all these data points can be switched on/off in settings if you so wish.
Ive got a Next base Dash cam. Was around £100 a couple of years back. Came in very handy after an accident I had on the M42, long story short I was hit in the back by a van [fleet vehicle]. The driver admitted responsibility at the scene however the companies insurance did everything they could...