I'm not sold yet on these pocket toys,
they still occupy valuable pocket space,
they can can fall out and smash
or the leads pop out, snag and rip a shirt pocket
a Cat 1
Multimeter Watch is the way to go, with retractable leads
Waterproof
Volts, cap/diode/temp test,
Ohms/Buzzer/Silent Vibrator,
24/7 clock and user heart rate/pulse too
It's 2017, decades after Detective Dick Tracy,
and no one has thought of it?