The PET LIFE Dream Smart Electronic Pet Bed is an Electronic Heating and Cooling pet bed. When Cooling Mode is activated the button turns BLUE and a silent fan located beneath the bed begins to apply cooling ventilation through the mesh cushion. When set to Heating Mode the button turns RED and the built-in heating nodes are activated and lightly penetrate through the ventilated mesh fabric and warms the cushion. Features Smart Thermal Control Technology - safety features that automatically turns off when the bed reaches a certain warming temperature. The bed is AC powered and features a built-in concealed zippered compartment for storing the AC plug. The exterior-shell is composed of blended polyester-nylon fabric that is inner-rimmed with a faux-fur fabric. Well designed and crafted, looks great in any home or office setting. MEDIUM: 25.6 in. L x 21.65 in. W x 7.1 in. H LARGE: 29.6 in. L x 25.6 in. W x 7.87 in. H Component Specifications: ADAPTER SPECS: INPUT: AC 100-Volt-240-Volt, 50 Hz/60 Hz OUTPUT: 12-Volt, 2000mA LENGTH: 4 ft. FAN SPECS: DC 12-Volt, Power Consumption: 6.6-Watt, Air Flow: 25.6 CMF, Air Pressure: 24.5 mm H2O Recommended Use: Heating Mode: Do not leave the device on for more than 48-Hours. Cooling Mode: Do not leave the device on for longer than 4-Hours at a time. It is recommended to turn off the device for at least 10-minutes between usage intervals. Certifications: ISO, UL, CE, RoHS.