Depending on the power tool, its feature label may include the following symbols:

………………………. Volts or supply voltage
…………………… Hertz or hertz, frequency of operation
………………….  Minuts
………… Direct current
………………… Class I insulation (ground)
…………….. Per minute
……………….. Blows per minute
………………… Impacts per minute
………………. Revolutions per minute
…………….. Feet surface per minute
……………………. Amperes
…………………… Watts
……….. Alternating current
… Alternating or direct current
…………………. Class II insulation (Double insulation)
…………………. Security warning
………………… Eye Protection
………………… Hearing protection
………………… Respiratory protection