... eggDuck eggGoose eggJD--326418996220V/50HZ 1. our product is microcomputer full-automatic with coal and electricity, can keep temperature within 6 ... frequency are displaying ,also adjustable according your actual request ,3. Automatic turning and ventilating system4. Two fans , bigger one is ... to be working at al times, smaller one is automatic controlling high temperature.5. It is make of double ...