Feet of shelf space (each tray 16" x 14-1/2") is dried by a rear mounted fan and 770 watt heating element making clean up easy. The adjustable thermostat (90 - 150 degrees) and 12 hour timer will make food dehydration a snap. The dehydrator will shut off when the preset time has elapsed. Dry pounds of Jerky, bushels of fruit, vegetables and nuts with ease. Instructions included - 110 Volt - External dimensions 18" x 15" x 16-1/2", 10 chrome plated trays. ETL Certified