Package Dimensions:14.8 x 8.2 x 5.2 cm; 210 Grams Size:30W Quantity:1 batteries required:No Item Weight:210 g welcome to my store , Hope you have a pleasant shopping trip! Features:1.Note: When using, the heating rod must be fully submerged in the water, which is simple to use and easy to install.2.Three-digit display for precise temperature control; automatic constant temperature over-temperature protection, safe heating; external temperature regulation 18C~34C (64F~93F); quartz explosion-proof3.Use black sand to conduct heat, prolong the service life of the heating rod, ultra-short, small and small, occupy a small size of the fish tank, and do not affect the landscape in the tank. Suitable for: freshwater fish tank, seawater fish tank, aquarium, betta fish tank, micro tank, turtle tank, horned frog and other mini fish tank heatingSpecifications Size: The heating rod is about 5.5CM in length and 2CM in diameterPower: 10W/20W/30WInput voltage: 100V-240V 50/60HzPlug Specifications: UK PlugPower cord length: about 1.3mApplicable fish tank water capacity: 10W-3L; 20W-5L; 30W-8L;Package List:1X Aquarium HeaterNotes: 1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.2. Please allow 1-2cm slight dimension difference due to different manual measurement. Using External Control Electronic Temperature Regulation, Intelligent Frequency Conversion Technology, High Heating Efficiency, Three-digit Display to Accurately Control Temperature, Adjustment Accuracy 0.5 / 1 Built-in Temperature Sensor, the Water Temperature Can Be Accurately Displayed on the External Controller in Real Time, and the Temperature Adjustment Range Can Be Set Arbitrarily From 18C to 34C (64F to 93F). When the Water Temperature Is Lower Than the Set Temperature, the Fish Tank Heater Will Automatically Start Heating Keep the Water Temperature Constant Until the Water Temperature Reaches the Set Temperature Using Quartz Explosion-proof Glass, Strong and Corrosion-resistant, Automatic Constant Temperature, Automatic Power Off When Over 36C/96F 10W/20W/30W (optional) Power 10W Is Suitable For 1-3L/0.26-0.79 Gallons Fish Tank, Power 20W Is Suitable For 4-6L/1.06-1.59 Gallons Fish Tank; Power 30W Is Suitable For About 8L/2 Gallons Fish Tank SHOP WITH CONFIDENCE: To Provide You With the Highest Quality Service, If You Have Any Question, Please Feel Free to Contact Us.We Will Provide After-sales Service Until You Are Satisfied. See more product details Using External Control Electronic Temperature Regulation, Intelligent Frequency Conversion Technology, High Heating Efficiency, Three-digit Display to Accurately Control Temperature, Adjustment Accuracy 0.5 / 1 Built-in Temperature Sensor, the Water Temperature Can Be Accurately Displayed on the External Controller in Real Time, and the Temperature Adjustment Range Can Be Set Arbitrarily From 18C to 34C (64F to 93F). When the Water Temperature Is Lower Than the Set Temperature, the Fish Tank Heater Will Automatically Start Heating Keep the Water Temperature Constant Until the Water Temperature Reaches the Set Temperature Using Quartz Explosion-proof Glass, Strong and Corrosion-resistant, Automatic Constant Temperature, Automatic Power Off When Over 36C/96F 10W/20W/30W (optional) Power 10W Is Suitable For 1-3L/0.26-0.79 Gallons Fish Tank, Power 20W Is Suitable For 4-6L/1.06-1.59 Gallons Fish Tank; Power 30W Is Suitable For About 8L/2 Gallons Fish Tank SHOP WITH CONFIDENCE: To Provide You With the Highest Quality Service, If You Have Any Question, Please Feel Free to Contact Us.We Will Provide After-sales Service Until You Are Satisfied.