Designed for ease of use, this mini heater is ideal for maintaining a stable temperature in small fish tanks and pet water bowls. The USB power supply offers flexibility, allowing use in different locations. The temperature control feature ensures that your pets always have access to water at the desired temperature. Features - Color: Black - Material: Aluminum Alloy - Size: 7.70 × 1.50 × 1.00 cm / 3.03 × 0.59 × 0.39 in - Automatic thermostat: automatically regulates temperature to meet the specific needs of your pet's drinking water - Miniature design: compact size is ideal for small fish tanks, providing effective heating without occupying much space - USB heating rod: powered by a USB connection for easy and flexible usage - Frequency conversion: adjusts heating power based on environmental temperature changes for efficient energy use - Convenient installation: features suction cups for tool-free installation Package includes: 1 × Aquarium Heater