• Compact heater built for small aquatic setups 10 W USB heating rod designed to maintain stable temperatures in very small tanks and water containers Submersible design and precise control make it suitable for 2 L tanks and similar smallvolume environments • Reliable temperature control and safety Adjustable control range: 18–34 C for consistent, healthy habitat conditions Builtin overheat protection: unit automatically cuts power if water temperature exceeds 36 C Waterout poweroff prevents dry firing when the heater is not submerged, extending service life • Simple USB power and accurate sensing Operates from DC 5V 2A via USB for common lowvoltage setups Electronic sensing mechanism provides accurate thermal regulation while minimizing energy waste • Small, durable form factor Compact dimensions: 5 x 2.5 cm for discreet placement inside tanks or containers 136 cm cable length allows flexible positioning of the USB power source Black ABS housing, built for longlasting use in general freshwater setups Practical use scenarios Betta fish tanks: keeps small tanks warm and stable without bulky equipment Turtle enclosures or small reptile water dishes: maintains comfortable water temperature for small occupants Pet drinking water systems: prevents water from getting too cold for pets in chilly environments Key specifications at a glance Power: 10 W Power input: DC 5V 2A via USB Temperature control: 18–34 C (precise control) Safety cutoff: >36 C (automatic) Size: 5 x 2.5 cm Cable length: 136 cm Housing: black ABS Ideal for: 2 L tanks and similar small freshwater applications Installation notes Fully submersible—ensure the device stays submerged during operation for correct sensing and protection to function Use a compatible 5V 2A USB power source; check that the power adapter and cable are suitable for continuous lowvoltage operation