Those "spec sheets" are pi** poor. It does appear to convert voltage but only at max 2.5A as stated by others. So no curling iron etc. Hair dryers are provided at all hotels as far as I know. There are other adapters that do not convert and they are smaller, and are for devices with "universal" input (90-240 VAC). These are things like cell phone chargers, electric razors, electronics etc as said before.

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1998 C230 330,000 miles (currently dead of second failed EIS, yours will fail too, turning you into the dealer's personal human cash machine)
1988 F150 144,000 miles (leaks all the colors of the rainbow)
Previous stars: 1981 Brava 210,000 miles, 1978 128 150,000 miles, 1977 B200 Van 175,000 miles, 1972 Vega (great, if rusty, car), 1972 Celica, 1986.5 Supra