Aquarium Heater Thermostat Temperature Controller Heating And Cooling Freshwater Product Details 1. How Pymeter control temperature? Temperature controller is actual Heating/Cooling controller, thus MUST SET ON-Temp to turn ON Heating/Cooling, and MUST SET OFF-Temp to turn OFF Heating/Cooling. Heating starts at LOW Temp [ON-Temp(1oN, 2oN)], stops at HIGH Temp [OFF-Temp(1oF, 2oF)], thus for heating MUST SET 1oN(2oN) LESS than 1oF(2oF); In heating mode, 1oN(2oN) is the minimum temp you allow, 1oF(2oF) is the maximum temp you allow. Cooling starts at HIGH Temp [ON-Temp(1oN, 2oN)], stops at LOW Temp [OFF-Temp(1oF, 2oF)], thus for cooling MUST SET 1oN(2oN) GREATER than 1oF(2oF). In cooling mode, 1oN(2oN) is the maximum temp you allow, 1oF(2oF) is the minimum temp you allow. 2. Reading temp is inaccurate? Every Pymeter controller is calibrated before come out of factory, it is reading temp accurately! Please don't compare it to common inaccurate thermostat?thermometer or temp gun. If you doubt Pymeter controller accuracy, please calibrate with ice-water mixture (it is 32F when ice is melting), and you will see which device is accurate then. Plug and Play: Pymeter temperature thermostat is incredibly easy to use?simply plug your heating/cooling device into the outlet, place the probe in the area you want to control, the large digital display supports both Fahrenheit and Celsius, and the upper display shows the current temperature while the lower display shows the control mode. With a maximum of 1200W/10A per outlet and a temperature range of -40-210?/-40-99? with 0.1C accuracy Dual Functionality: Pymeter temperature controller features two separate outlets, each capable of controlling both heating and cooling devices simultaneously, ensuring optimal temperature control for your application Safe and Reliable: the temperature controller is designed with safety and reliability in mind. The Buzzer Beeps to alert you if the temperature goes outside your set range, and every Pymeter thermostat is calibrated in the factory. With Power-On delay, it can protect your compressor from frequent ON-OFF, ensuring your equipment stays safe and protected while in use Versatile Applications: Pymeter temperature controller is perfect for a wide range of applications, making it a versatile addition to your home or business. Whether you're a hobbyist, farmer, or professional, our controller is ideal for seedling germination, clone rooting, home brewing, pet breeding, and maintaining ideal temperature ranges for greenhouses, reptiles, aquariums, terrariums, incubators, and more Friendly Customer Service: We are committed to providing our customers with the best possible customer service. If you have any questions or concerns about our temperature controller, our friendly customer service team is available 24/7 to assist you. Plus, with our 30-day money-back guarantee, you can order with confidence. Add it to your cart now and experience the benefits of precise and reliable temperature control! Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.