Twiddley Beep Rhythmic Tone Continuous 1
https://elements.envato.com/twiddley-beep-rhythmic-tone-continuous-1-PYYSH6E
Free
Twiddley Beep Rhythmic Tone Continuous 2
https://elements.envato.com/twiddley-beep-rhythmic-tone-continuous-2-NJAVQP5
Free