About this item Heating film structure: heating film ensure uniform heating. Warms root area 10-20℉ (5-11℃) over the ambient air temperature, which will increase the success of seedlings and cuttings, temperature can be adjusted manually with adjustable knob. Durability: supple, flexible, the sturdy edge design let the mat is ultra-durable. water-resistance that enables safe scrubbing. Works perfect for indoor seedling starts and plant propagation. Technical specifications: temperature control range is 40-108°F, temperature display range is 32 -140°F. Rated voltage is 120VAC 60Hz, max loading: 8.3A 1000W. Do not immerse controller or probe into water. Easy to use: set temperature in seconds by using just 3 buttons. Digital display supports units in both Fahrenheit and Celsius. Note: the controller is designed to have a 2-3 degree buffering zone before powering on again after reaching set temperature. Package included: 1 pack seedling heat mat with temperature adjustable knob, 1 pack digital heat mat thermostat controller.