Keep Your Aquariumsfish Bowls At The Right Temperature With Hygger Mini Heater Made Of Shatterproof Quartz Glass, Covered With Protective Guard To Prevent From Scalding And Punching, Our Compact Submersible Heater Helps Create The Perfect Water Condition For Your Fish And Turtle To Thrive In Bowls And Tanks Up To 13 Gallons The Exterior Temperature Button Control Frees You From Getting Hands Wet And The Red Indicator Light Illuminates To Let You Know The Heater Is Working Two Suction Cups For Easy Installation Features: Ip68 100% Waterproof, Fully Submersible Dual Protection - Durable Quartz Glass Tube, Shatterproof Construction Double Sealed Material And Protective Container For Scald Preventing And Anti Punching Accurate Temperature Control From 63Af To 93Af (17Ac 34Ac) Thermo Control - This Mechanism Enables Running-Dry Protection The Heater Will Shut Off When Removed From The Water Easy To Read Led Digital Display Shows Water Temperature Ideal For Used In Turtle Aquarium, Freshwater And Saltwalter Aquarium Specification: Item Name: Hygger Submersible Mini Heatersmodel: Hg-916Voltage: 110V-120V, 60Hz Power Cord Length: 49 Ftavailable In: 50 Watt, For 165 Gallon Fish Bowl100 Watt, For 6513 Gallon Fish Tank How To Set Temperature: 1 Place Heater Inside The Aquarium And Keeps It Fully Submerged 2 Plug In Power And You Can See The Red Light Indicator On And Led Digital Number Display Current Water Temperature 3 Press Button To Your Desired Temperature, It Will Blinks 3 Seconds, Then It Return To Current Water Temperature 4 The Heater Begins To Heating Warm Tips: 1 Please Read Instruction And Cautions Of Package Box Carefully Before Use 2 Always Keep Heater Rod Fully Submersible 3 Before Take Out The Heater, Please Disconnect Power And Wait For 10 Minutes To Cooling Down