Is this a serious post?

My Google Pixel 6 supports wired headphones with an adaptor. Like every other Android, it has GPS, and there are plenty of offline music apps.

I believe Google maps supports downloading maps for offline use.

I have a similar usecase (offline GPS for biking). For that, I’ve repurposed an old, unsupported Android phone. I keep the phone permanently in Airplane mode. It plays music files and I can put Navit on it for offline GPS.

I don't know about the wired headphones, but maybe some cheap WiFi only smart watch will do? I don't know about offline navigation without a phone, but with modern smartphone tech surely someone has ported OsmAnd or whatever to a cheap Wear watch.

Like the other commenters have mentioned, if the premise is to prevent the child from going online, I am not sure if I agree with this approach...

But to answer your question as stated: it looks like the Sony Walkman models NWZ-Z1040/Z1050/Z1060 runs (ran?) android and has a GPS receiver, but no cellular capability.

https://helpguide.sony.net/gbmig/44361551/v1/eng/contents/07...

I can't find any newer Walkmans that have GPS receivers, but you might want to look there. I know everyone is telling you to use a old phone, but I am sure that you can find a device to suit your needs. Good luck!

(If you are handy, you can also use an old phone, open it up, and physically destroy the antennas, although this might hurt the battery life if the firmware decides to crank up the transmission power to maximum, if it cannot "see" any networks or towers).

But for maximum street cred, I'd go with two devices: a 'vintage' mp3 player and a 'vintage' or rugged GPS receiver. The more obscure the better. Those things are cool now!

Edit: The Garmin iQue were also Palm PDAs that had a GPS receiver and a headphone jack. They also look pretty rad and turn-of-the-century :) But remember, at some point children establish their own tastes and identities partially defined /against/ their parents, so just because you might think that something is cool doesn't mean that they would.

Do you want to track your kid, or give them access to maps? If the latter, offline maps on any number of phones should work great these days. You could lock down the phone heavily so they can’t get access to anything besides music and maps, as well.

Kids will get around restrictions. I think the best solution is an iPod nano and Garmin etrex. The mp3 player with airtag glued isnt bad either, or put it in the internals speaker out.

An older iPhone without a cell plan, with some EarPods.

2022 iPhone SEs go for about $120 on swappa.com.

We use a Garmin watch for location and comms with our kid. Works pretty well.

I was using a Shanling M0 music player, and it's pretty nice, but I've become lazy and don't like the chore of loading music on it. I have not found a good solution yet for a music(& podcasts) only portable streaming player.

When you say "GPS" what do you mean? Offline maps? or do you mean tracking the location of the device (and kid)?

MP3 player with an AirTag hot glued to the back

What is the use case? - GPS devices works better if they have cellular connection - Do you need maps?

We had similar requirements and used an older iPad, a model without SIM slot. You can lock down the WiFi to make it completely offline.

Does anyone know of such a device, or at least pointers?

To me, it sounds like two devices is the simplest thing that might work...or three devices considering wired headphones.

What's the use case? Music playing depending on the position?

Don't they have flip phones that do that? Shouldn't people be able to call for help if they're going so far that they would need a GPS?

Any reason for the wired headphone requirement besides resistance to change?

Because you should be able to find a good quality pair for well under $50, and that would open up your device options to a wide array of smart watches. On top of that I think your kid will enjoy wireless more than wired.

Otherwise I’d recommend an iPod touch, or any old smartphone. Just set them up with mobile device management so that you can lock out any features you don’t want your kid using.

You can even activate the cellular and keep it quite locked down. You could restrict basically everything: apps, web browsing, calls, texts, etc.

probably not the answer you’re looking for but iPads match the description (usb-c headphones for the newer models)

Qin F21/F22

You can very easily physically remove the modem and WiFi card from Librem 5 (those are on M.2 cards). GPS and headphone jack are there.