Grow indoors or out, protected from all the elements, scavengers, and temperatures that could harm your plants. You're in full control with this Germination Station and included heat mat. The station's plastic top means better humidity control for optimum growth, and having everything in one, heatable space leads to healthier growth starts and increased germination success. Add your own choice of growing media and plugs to get growing. UL listed waterproof heat mat (included) is 17 Watts/120 Volts. 11in x 22in watertight base tray.