@Sushi - finally figured out why my monitor is stopping so frequently. I've had readings as low as 25 and as high as 194, which it seems to handle OK. But the sudden jumps and skipped beats, which I can feel, cause it to quit. I've been in a crash lately and it's quitting every time I get up or move suddenly. Any ideas? It's a chicken egg thing. Is my heart wacky cause I'm crashed, or am I crashed because my heart is wacky? Your experience please?