Black clip-on guitar tuner with yellow sticker

I found this small black clip-on guitar tuner with a bright yellow sticker on the back. I found it this afternoon around 3:10 PM in the Mall del Norte parking lot on Del Mar Boulevard in Laredo, Texas, near the main entrance. It's in decent condition, with a tiny scratch on the LED display and a few light nicks on the clip. The back has a yellow sticker with the initials 'J.R.'—a pretty unique identifying feature that might belong to someone who plays guitar. If this is yours, tell me what the sticker says and where you typically keep a tuner, and we can arrange a quick meetup in the area.