SMALL NOT TAKE UP SPACE: hygger 75W/150W heater can be installed horizontally or vertically, also for saltwater & freshwater, and can be used in various small turtle and fish tanks, which can fully meet your needs. Note: Do not put the heater in the sand.Please make sure that the water surface is at least 2 inch above the heater. SAFE AND ANTI-BURN: The nickel-chromium heating wire materials has higher thermal energy efficiency, and then conducts heat through silicon carbide material, which effectively utilizes electrical energy to convert into thermal energy, with long service life and uniform heating, with quartz glass material, safe explosion-proof and anti-burn. The exterior high tempe resistant plastic cover, not easy to deform. OVER TEMPERATURE PROTECTION: Intelligent induction device, stable work, good performance, over-temperature protection, avoid cooking fish due to high temperature. When temp pass 95 °F, the LED display showsflashing 95 number code, red and green light flash together, the heater will shut off automatically. ANTI-DRY PROTECTION: Intelligent temp sensing, when the heater is exposed to air, display ER fault code and the heater will shut off automatically. When the heater is completely immersed in water, it will start working automatically. Effectively extend the service life. It has a power-off memory function and no need to set it again. DIGITAL DISPLAY & EXTERNAL CONTROLLER: Easy to use, LED digital display, external hand controller, press one time adds one degree, can be set between 59?(15?)~93?(34?), easy to know the real-time temperature. The working status can also be displayed, red light on: heating, green light on: constant tempe.Best Sellers Rank: See Top 100 in Pet Supplies. : B0B8NFWCWZ. Manufacturer: hygger. Date First Available: August 4, 2022. Package Dimensions: 8.58 x 4.65 x 4.49 inches; 1.17 Pounds.