Mobile phone finder

[EmpressaurusKitty]

My dad is losing his mobile phone & remote control increasingly often so I’m thinking of getting him this for Christmas. What I like is that it wouldn’t depend on him having Bluetooth enabled his phone, or even on the phone having battery.

I wondered if anyone has any experiences / recommendations?

www.amazon.co.uk/dp/B0B1VWSWFN/ref=sspa_mw_detail_0?ie=UTF8&psc=1&sp_csd=d2lkZ2V0TmFtZT1zcF9waG9uZV9kZXRhaWwp13NParams

Is it an iPhone?

Yes, but the reason I’m leaning away from anything like FindMyPhone is that he often switches it off or puts it on airplane to ‘save the battery’ & then can’t remember where he put it.

The audible alarm on FindMy will work even when the phone is off or with a flat battery.

What I really want is something that doesn’t involve anyone having to make any adjustments to his phone - it will honestly be much simpler to have something that can just be attached to the case, hence looking at things like the finder in my OP.