10W 5V/2A USB Super Mini Betta Heater LED Digital for up to 1 Gal Tanks

Additional Details from the Manufacturer

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More features

• SUPER MINI SIZE – This mini fish tank heater is just about the size of a thumb – only 1.97”(5cm) long. It's fantastic for nano tanks/betta tanks. The groundbreaking super tiny design brilliantly addresses the fish keepers' annoyance with traditional heaters! Occupies less space, easy to tuck away, but packs a punch in power! Temperature ranges between 64-93F, suitable for tanks up to 1 gallon.
• PRECISE TEMPERATURE – Courtesy of sophisticated inverter technology, with its in-built chips, this thermostat maintains the heater at a steady temperature with an accuracy within 1F, a lot more precise than conventional knob-controlled heaters. The thermostat displays 2 readings – the current temperature and the designated temperature – making it super user-friendly.
• 5V/2A USB POWER SOURCE – This ultra-safe 5V/2A USB power source keeps you worry-free from any potential electric shock risk to your cherished fish! Use a 5V/2A power adapter or a 5V/2A power bank to fuel up the heater. (Note: Power adapter or power bank not included)
• OVERHEATING SAFEGUARD – Safety comes first. This betta heater will automatically stop running once the water temperature exceeds 97F. No more fretting about "cooking fish"!
• MEMORY FEATURE – The last setting is saved within the thermostat. In the event of a power outage, the heater will revert to the last setting once power is restored.
• VERSATILE USES – This betta fish heater can be used in both fresh and saltwater. Not only can it serve as an aquarium heater, but it also works well for turtles, pet fountains, and plant seedlings.