Welcome to Tintor. Tintor is a professional store specializing in aquatic products and accessories. We are committed to providing customers with quality products and better services. We have 24-hour customer service, covering pre-sales and after-sales services. If you have any questions, please feel free to contact us. [Product Name]: Tintor Aquarium Diving Heater [Specifications]: 1200W [Voltage]: 110V / 60Hz Product Size [800w/1200w]: 12.04in*3.07in [Power cord length]: 4ft+5.9ft ?Controller?: External LED digital temperature controller (not waterproof) Temperature accuracy: ±1? ?Package includes?: 1 × heater with external controller; 1 × user manual; 4 suction cups Why choose Tintor aquarium heater for your fish tank? 1. It is safe to use. When the water temperature exceeds 95°F, the digital aquarium heater will automatically turn off. When the top of the heater exceeds 0.8 inches, the aquarium heater will automatically turn off. 2. It is non-explosive, with high temperature resistant and environmentally friendly plastic shield, and the heating element is high-quality and durable quartz tube, which can be used for fresh water and salt water. 3. Energy saving, built-in PID chip, compared with ordinary aquarium heater, energy saving up to 30%. 4. Digital display, you can check the water temperature at any time and set the temperature on the controller. It is easy to set the temperature. There is only one setting button on the controller, and the temperature can be selected from 68°F to 93°F by pressing this button. [Warm Reminder] In the process of using the heater, in order to make the temperature of the fish tank uniform, please be sure to use it in conjunction with the circulating water pump. If you have any questions, please contact us, I wish you a happy shopping. [Quality Assurance] This product is guaranteed for one year. In the process of using the product, if there is any dissatisfaction, please contact our aft ?APPLICABLE FISH TANK SIZE?The suitable range of this fish tank heater: 800W (100-210gal) 1200W (150-300gal), this heater is suitable for seawater fish tanks and freshwater fish tanks. ?PRODUCT FEATURES? (1) The heater has automatic power-off protection function when it leaves the water surface. (2) Automatic fault detection, flashing prompt. (3) LED digital display, the fish tank temperature is clear at a glance. (4) Constant temperature protection to prevent cooking fish. (5) Adopt frequency conversion heating technology to save energy and electricity. ?POWER-OFF MEMORY FUNCTION? When it recovers after a power failure, without any operation, the heater will automatically restore to the temperature setting before the power-off, saving you the trouble of resetting the temperature. ?EXTERNAL SMART THERMOSTAT? The controller uses PID smart chips, fast heating, high efficiency and energy saving, intelligently maintains constant temperature, and can accurately control the temperature within ±1ºF. ?SAFE AND DURABLE? The aquarium heater uses explosion-proof quartz tube, high temperature resistant environmental protection ABS plastic protective cover, high-definition LED digital display controller and high-quality power cord, which is safe and more durable for your fish tank.Best Sellers Rank: See Top 100 in Pet Supplies. : B0917RY834. Manufacturer: TINTOR. Date First Available: March 27, 2021. Package Dimensions: 17 x 8 x 2 inches; 3 Pounds.