... if skin had been touched by RF handle, then we output enough RF power, to make it more-effective on the skin. We ... safe, you still have to use gel when the RF is working, to reach maxim safety.>> RF Heat Automatic ControlExperienced RF function users may discover ... Conditions:-5ºC to +50ºC, up to 5,000 feet (1500 m)-5ºC to +45ºC, up to 10,000 feet (3000 m)-5ºC to +45ºC, at ...