No credit card boys cams
I've made my own predator call with an ammo box, horn speaker and a small 9v portable amplifier.
If you just need a bunch of numbers use the online credit card number generator.
I've got Stealth Cam trail cameras so they work together flawlessly. Indoors or in the shade and it's not a problem to see.
The display resolution is not that high so photos are not very detailed, for those that are used to viewing smart phone screens, it's quite a bit lower resolution.
If you want to go one step further and generate a whole test identity, try the Fake Name Generator.
It makes use of this credit card generator, and adds a lot of other identity data.
I find this trail cam card viewer to be sufficient.