Warm tips: Please do not immerse the heat mat in water. Please note that this is 21 watts seedling mat, if your greenhouse, terrarium or aquarium is too big, maybe this can not get enough heat. Because it is just 21W, it will not heat once you plug in the power supply, please wait for about 10 ~ 30 minutes, it warms up slowly.Features: Seedling heat mat for better veggie, herbal and flower seed germination -Warms root area 10 to 20 above ambient.The heating mat surface temperature can reach about 30~40 Celsius / 85~104Fahrenheit, heat mat can not adjust temperature. Size of greenhouse heated mat: 20 x 10 inches. Power: 21 watts, AC 230~240V 50/60Hz. Low power consumption. It is well suited as a heated propagator for indoor greenhouses as well as for use in the terrarium area, fish aquarium, beer brewing ect. Heat pad with Ideal heat source for optimal supply of terrarium animals, reptiles, indoor greenhouse, veggie, herb, and flower seed germination.Specification:Material: PVCInput: AC100~240V 50/60HzPlug Type: AU PlugPower: 21 WattsSize: 20 x 10inCable Length:180 cm (70.87)Cert:UL/ETL/CE/RoHSPackage Included:1 x Heating Meat (AU Plug)NOTE:PO BOX address is not supported, please provide the correct physical addressATTENTION:If the customer change their mind and want to cancel the order, please contact us within 2-3 hours after placing the order. Or, once the package is dispatched, we won\'t be able to intercept packages in transit. Please understand.