Ohm’s Law Watch. Complete with cheesy headlines and strangely comforting geek credibility. $24.99.

‘Incorporates Ohm’s Law, Joule’s Law for power and a resistor color reference chart…Great for electricians, electronics engineer or technician, engineers, designers, hobbyists, or general geek using electrical and electronic formulas…Also, at each hour position are colors corresponding to resistor band codes (Brown at 1 and Red at 2, so on).’