Need help with wireless button

Projects General Guidance
1

Hi everyone.

I have a MPU 9250 with aeduino mini writing on to a attached LCD . I want to add a wireless switch to the arduino so that I can pause the display at a particular point and note the values for that point.
please suggest how I can achieve this. The wireless switch pair can be only one way i.e one transmitter and one reciever.

2

How about one of these* and a keyfob? No programming required: it's literally a wireless button, so you digitalRead() the button like a wirey button.

*note there are 3 different models: momentary, toggle and latch.