Double protection and precise control - Temperature adjustable from 18 to 34 C with auto shut-off at 36 C to prevent overheating, providing safe, stable warmth for small tanks. - Digital LED temperature display for easy monitoring, suitable for 1-2 L water. Compact, easy installation - Mini design that saves space and can be mounted on the outer edge of the aquarium, keeping the tank tidy and visually appealing. Accurate and versatile - Temperature setting accuracy 0.5 C or 1 F, allowing precise control within the 18-34 C range. USB powered and efficient - 10 W, 5 V 2 A power supply with a Type-C USB connector and a 1.3 m cable for flexible placement. specifications - Material: PP tube - Power: 10 W - Voltage: 5 V 2 A - Connector: Type C USB - Temperature range: 18-34 C - Water volume: 1-2 L Physical details - Heating rod size: 5.2 cm x 1.9 cm - Controller size: 6.5 cm x 3 cm Package - 1 x fish tank heating rod Use scenarios - Ideal for 1-2 L nano tanks such as betta and small shrimp fry setups that require gentle, reliable warming. - Suitable for dorm, office, or travel use where USB power sources (laptops, power banks, USB chargers) are available. - Handy for quarantine or observation tanks that need portable, compact heating without bulky equipment.