Features: * 8.5cm in length, 18mm in diameter, does not take up space, suitable for small desktop fish tanks. * Made of high-quality quartz glass material, you can use it with confidence. * Built-in intelligent chip controls 26 degrees Celsius constant temperature, no need to adjust * Built-in intelligent thermal sensor component automatically protects from dry burning when out of water * Filled with black gold sand to gather heat and heat up, full heat energy conversion, fast energy gathering and more power saving * Adopting USB interface design, it can be connected to a power bank or mobile phone power supply head for power supply, giving you convenience and safety. Specifications: * Product name: Fish tank heater * Material: Quartz + Metal * Color: As shown in the picture * Size: 18*85mm * Wire length: about 130cm * Temperature control range: 26 automatic constant temperature * Power: 10W * Voltage: DC5V * Applicable water volume: less than 25 liters Package Contents: 1 x Fish tank heater Notes: 1. Due to various factors such as display brightness, light brightness, etc., the actual color of the product may be slightly different from the website picture. 2. The data may be slightly different from manual measurement.