A small device that records unbalanced line-level audio signals to microSD or alternatively act as a USB audio interface:
https://www.howler-audio.com/product/howler-recorderstreamer/It seems quite pricey for what it does, but I like the idea of a simple recorder with a very reduced user interface.
I can imagine it'd pair nicely with a Tinybox or a bigger preamp in case monitoring with headphones is required.
TECHNICAL SPECIFICATIONS (from the website):
Input: RCA left & right
Output: RCA left & right (THRU)
File storage: MicroSD card
Recording format: WAV or MP3 (320 kbps)
Recording quality: 24-bit & 48 kHz
Streaming quality: 16/24-bit & 48 kHz
File-transfer compatibility:
Phones & tablets: Android USB-C & iOS devices
Computers: Windows & macOS
Power-supply: 5V USB-C
Battery: Rechargeable Li-Po battery, up to 30 recording hours
Dimensions: 88 x 63 x 28 mm (l, w, h)
Weight: 128 g