Feature - Color: As shown. - Material: Stainless steel - Size: Approx. 23x3x3cm. - Easy installation, simple operation, high security. Safe and reliable in both fresh water and salt water aquariums - Good choice for your fish tank and aquqrium. - Temperature control range of heating rod :18-34 degrees. - The light is on to indicate that it is heating up. - When the heating rod is working, it is recommended to install a water circulation system, so that the tank temperature can achieve a better balance effect. - Note: Due to the strong heating effect of this product, when using this product, it is necessary to pay attention to the change of water temperature within 48 hours before the low temperature slowly rises to the temperature you need, so as not to cause high temperature. The heating rod must be completely. Do not wash with detergent, solvent or acidic liquid submerged. When cleaning the heating rod, please cut off power 15 to 20 minutes in advance to cool it, so as not to burn.