10W Adjustable Mini Aquarium Heater USB Powered Fish Tank Warmer with Temperature Display for 1-5L Tanks

[Mini Aquarium Heater] Measuring just 5cm (1.97 inches) long, this compact aquarium heater occupies minimal space and is simple to conceal in the fish tank. The English Celsius model offers a temperature range of 18°C-34°C. Please choose according to your needs. [USB Powered Tank Heater] This heater runs on a 5V/2A USB power supply, making it very safe. There is no need to worry about fish being electrocuted. Please use a 5V/2A power adapter (not included) or a 5V/2A power bank (not included) to power the heater. [Precise Temperature Display] With smart inverter technology, this thermostat keeps the heater at a constant temperature via a built-in chip, which is more accurate than knob control, and the display makes the temperature easy to read. [Overheating Protection and Power-off Memory Function] When the water temperature goes beyond the maximum range, the fish tank heater stops working. The heater remembers the temperature setting, and after a power outage, when power returns, it follows the last setting. [Widely Used] This fish tank heater is well suited to small fish tanks of 1-5L. It can be used in fresh and sea water, and works not only as an aquarium heater but also for pet fountains and plant seedlings. Please check as much as possible to make sure the item is what you need. Tips: The product may be updated constantly. Due to different batches, the actual product may have slight differences or color differences, which does not affect use Colour:Black Material:Plastic Package Contents: 1 x Fish Tank Heater Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the real thing. The measurement allowed error is +/- 1-3cm.