AquaMiracle Adjustable 150W Aquarium Heater Submersible Fish Tank Heater Super Short Aquarium Heater with LED Digital Display Thermostat, for Tanks 15-30 Gallons SUPER MINI SIZE ? This aquarium heater is SUPER SHORT in length ? might be the shortest heater in the market. It is only a bit more than HALF of the length comparing with the traditional fish heaters! The innovative super short length perfectly solves the headache of the fish keepers on the traditional aquarium heaters! Takes up less space, easy to hide, but in full power! Temperature range is 64-93F. 4 sizes for 10/20/30/40 Gallon tanks. ACCURATE TEMPERATURE ? Thanks to the intelligent inverter technology, with the in-built chips the thermostat keeps the heater at a constant temperature at an accuracy of 1F, much more accurate than the traditional knob-controlled fish heaters. The thermostat shows 2 readings ? the current temperature and the set temperature ? very easy to operate. DRY RUN / OVERHEATING PROTECTION ? Full consideration of safety. With the multiple protections this fish tank heater will stop working when the water level is lower than the minimum water level (DRY RUN PROTECTION) or when the water temperature exceeds 97F (OVERHEATING PROTECTION). You are free from ?cooking fish?! MEMORY FUNCTION ? The last setting is stored in the chips of the thermostat. In case of a power cut, when the power recovers the fish tank heater will follow the last setting. MULTIPLE USES ? This fish tank heater can be used for both fresh and marine water. It can be not only used as an aquarium heater, but can also work a turtle heater, pet fountain heater, and plant seedling heater. 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.