If you haven't stumbled across it yet, there is a digital grade rod available that shows the display at hand level, the receiver is built into the pole itself, the last I looked they were about 700 bucks or so. If your hard of hearing, it might be your best bet, for me they were not the fit I wanted, I can hear the receiver and had issues reading the digital display outdoors and if the light was wrong, about like trying to read my phone without my glasses on.
There are several companies that make the hand held display for a grade rod receiver, much like a control box in the cab for a machine receiver, like the one's listed here, it might fit your needs but for me they were like reading my phone, before you buy one, take it outside the store, and walk around with the receiver on the grade rod and have the hand held device in your hand and see if you can read it, again like the digital rods, they are tough to read outside, indoors they are great. If I recall they make them corded as well as mirrored to the receiver. I didn't care for these at all, too much to hassle with or lose either way you go and tough to read, as least with the digital grade rods, those were all self contained and slid together and easily carried in one hand, nothing to forget or lose. Best of luck