Submersible Aquarium Heater Fish Tank Heater Dual Temperature Display+Controller ?[100 watt heater] This 100 watt heater is suitable for 5-25 gallon water tanks, the heater length is 10.8 inches (about 27.4 cm), and the power cord length is 47 inches (about 119.3 cm) + 67 inches (about 170.2) Cm), please choose the appropriate wattage aquarium heater according to our size chart. ?[External temperature controller] This diving aquarium heater is designed to control the external temperature, allowing you to conveniently and safely adjust the temperature without taking the heater out of the water and taking risks. ?[Dual temperature display] Simultaneously display the water temperature and set the temperature, which can help you easily identify and observe temperature changes even at night. ?[High quality] Made of shockproof and shatterproof quartz, suitable for fresh water or sea water. In addition, the heat-insulating cover can protect your little fish from scalding. ?[Please note] The aquarium heater should be completely immersed in water. When cleaning the fish tank, changing the water in the aquarium or removing the heater, please unplug the power (please cool down in the water for a period of time before removing it). ? Diving aquarium heater 100 watts ? Specification: Power: 100W Voltage: 110V Water tank capacity: 5~25 gallons Adjustable temperature range: 44F-99F (1F) Wire 1: 47 inches (from controller to plug) Wire 2: 67 inches (from controller to heater) packing list: 1 100W aquarium heater with heater protection device 1 external temperature controller 2* Suction cup (heater) 2* Fixing tool (for controller) 1 user manual 1* packing box Notice: 1. For your safety and the best purchase experience, please read and follow the instructions carefully. If you have any questions, please contact us immediately. 2. During work, the entire heater must be completely immersed in water, but not buried in sand or mud. 3. Do not put the controller in water. 4. Please cut off all equipment in the aquarium before installing the heater. 5. Unplug the heater, wait at least 15 minutes, let the heating cool down before removing it. 6. It is best to install the heater in a place with strong water flow so that the entire aquarium can be kept at the same temperature. 7. If the wire or heater is damaged, do not use it. Shipping We offer FREE shipping on all orders within the Continental USA! We ship within Three business days of payment, usually sooner. We use a selection of shipping services such as UPS, FedEx, USPS etc. We ship WORLDWIDE, APO/FPO addresses or PO Boxes allowed IN SOME LOCATIONS. We ship to some of US protectorates free, not all. Pls check with us or we invoice your shipping. Local pickups and combined shipping options are not provided at this time. Return You can return a product for up to 30 days from the date you purchased it. Any product you return must be in the same condition you received it and in the original packaging. Please keep the receipt. Payment We accept payment by any of the following methods: PayPal, direct payments, credit cards. Please pay as soon as possible after winning an sale, as that will allow us to post your item to you sooner! Feedback Customer satisfaction is very important to us. If you have any problem with your order, please contact us and we will do our best to make you satisfied. Contact Us If you have any queries, please contact us via. We usually respond within 24 hours on weekdays. Please visit our store to check out other items for sale! Thank you for shopping at our store.