Power: 18 Watt, 220V~240V, Size: 24*52 cm. Cable length: 173cm. Warms the root zone 10-20 degrees above ambient temperature. Efficient: more effective than trying to heat a greenhouse or an entire shed, faster plant growth and seed germination, nice low-grade heat keeps everything at the right temperature Increases the success of seedlings and cuttings, durable construction, waterproof and easy to clean. Tips: 1. Do not immerse the mat in water. 2. Please kindly note this is 21W heating mat, it won't be too hot, maybe 10% higher than normal temperature. 3. Because it's only 21W, it won't heat up once you plug in the power, please wait about 10~30 minutes, it will heat up slowly. Designed with the latest technology Multi-layer construction, with an additional layer of insulating PET film, gives you the complete feeling that this seed heating mat will not overheat and burn your roots delicate 24 hours a day. Maintain Temperatures Easily Seed heat mat technology achieves a temperature 10-20C higher than seed temperature. ambient air - ideal for starting and spreading seeds! Maintains a constant temperature evenly, even in cold weather (with an insulating layer underneath). Water resistant design and extra fortified connection The resistance to IPX-4 water rating means you can clean carpet or wipe up spills without worry. Extra-reinforced connection between the extra-long power cord and the mat, which corrects a weak point common to other heating mats. (Energy-efficient design: only uses 20 watts.) Delivery quantity: 1 pieces