Features: 1.Silver plated contacts, automatic power off over temperature. 2.Double seal head, safe, waterproof and anticreep. 3.Mechanical adjustment knob, 18-34 degrees wide range of high precision, meet the needs of different environments. 4.Nickel-chromium electric heating wire, heat accumulation quickly, more stable. 5.Stainless steel heating rod, high strength, explosion-proof, anti-collision, durable. 6.Lasting constant temperature, keep at set temperature. 7.With top working indicator light, clearly show the heating state, and adopts translucence top cover, indicator light is more conspicuous after light on. 8.With two strong rubber suction cup, strong suction, fix firmly, hard to fall off. Specification: Item type: Fish Tank Heating Rod Material: stainless steel+ABS Color: As picture shown Optional voltage: EU 220-240V, US 110-120V Options: 50W, 100W, 200W, 300W, 500W TypeLength(cm/in)Temperature control range 50W19/7.518-34 Degree 100W 23/9.118-34 Degree 200W28/1118-34 Degree 300W32/12.618-34 Degree 500W37/14.618-34 Degree 1. The indicator lights up to indicate that it is heating. 2. When the heating rod is working, it is recommended to install a water circulation system to achieve a better balance of the fish tank temperature. 3. Do not use the heating rod in the sand, so as not to affect the temperature control. 4. Calculation method of fish tank water body (Aquarium length x aquarium width x water level height) CM=1000X2=? The result is the wattage of heating rod required PackageList: 1 x Fish Tank Heating Rod2 x Suction Cup Note： 1. When cleaning the heating rod, please turn off the power 15-20 minutes in advance to avoid burns. 2. Do not wash with detergent, solvent or acidic liquid. 3. Do not let children touch and play. 4. This stainless steel heating rod is only suitable for fresh water. 5. The heating rod must be completely submerged in the water. 6. Seawater, salt water cannot be used.