Heat-Sprout Seed Germination Heat Mat 110 V | Dimmer | 11 inch | 3 feet Terminals & electrical connections are sealed using a high performance self fusing sealant Warms root area 10-20?F over ambient temperature to improve germination No heat wires or thick pad, so heat is always dissipated evenly over the whole mat Moisture sealed electrical connections (Do not submerse in water) UL Listed Components