Features: Advanced Temperature Control: The mini aquarium heater features an electronic thermostat that allows precise temperature adjustment, ensuring a stable and comfortable environment for small fish like bettas. Compact And Space Saving Design: Its small and sleek structure fits easily in nano tanks, betta bowls, or small aquariums without taking up valuable space or disrupting the tank's aesthetics. Energy Efficient 10W Performance: Designed for small water volumes, this heater delivers efficient heating with low power consumption, making it ideal for eco conscious users and continuous operation. Safe And Reliable Operation: Built with shatterproof materials and dry start protection, this heater prevents damage when accidentally powered on outside of water, enhancing user safety. Easy To Install And Use: Simply submerge and plug in to activate, with intuitive controls allowing quick setup for beginners and hassle free maintenance for experienced aquarium owners. Specifications: Material: High Temperature Resistant Glass + ABS Plastic Power: 10W Voltage: 5V/2A Thermostat Range: 18°C - 34°C (Adjustable) / 26°C (Constant) Cable Length: 1.3m Port: USB Size: 5.2*1.9cm Applicable Water Volume: 2L Include: 1 * Mini Aquarium Heater 1 * Suction Cup