Product advantages: compact and comfortable, easy to use, space-saving and easy to carry. Suitable for low water level environments. It is suitable for heating small aquariums, small turtle tanks, and small tanks. Please purchase products that suit you according to the amount of water. Working status: plug and heat, normal temperature increase of 1-4 ℃ per hour, depending on the influence of water volume and ambient temperature. Low-light working indicator, light below 25 °C turns on and warms up, the light will turn off above 25 °C to stop heating. Low-voltage power supply: USB low-voltage safety power supply, 5V power supply with USB plug, suitable for use in a power bank, comes with a 2 m power cable. . Built-in automatic protection chip for constant temperature: once the temperature exceeds 25°C, the power protection will automatically turn off.