Bored Kitty V021 -

Unlike ultrasonic pest repellers (which annoy cats), v021 uses . You play a 10-hour loop of "quiet household ambience" that contains random, sub-second bursts of rodent squeaks (filtered to 40 kHz, just above human hearing but perfectly clear to cats). The bursts occur every 3 to 11 minutes. Your cat will freeze, rotate their ears, and engage in orienting behavior —the mental equivalent of a Sudoku puzzle.

: This version is often presented as a unique digital collectible or character design. bored kitty v021