Product features: 1. Automatic constant temperature control with high-temperature protection. USB plug compatible with standard 5V mobile phone chargers or power banks. 2. Maintains a stable water temperature of 26°C. 3. Constructed with quartz glass for enhanced durability and safety. 4. Compact design: heating rod measures approximately 52mm in length, similar in size to a thumb. 5. Operates effectively with a minimum water level of 2cm. Suitable for freshwater and saltwater aquariums, small pet water dispensers, and habitats for fish or turtles. Product name: Mini Aquarium Heating Rod Main body dimensions: approx. 8.5 x 1.8 cm Intended use: small aquariums or pet water dispensers Temperature control: fixed at 26°C Power rating: 10W Input: 5V DC, 2A Recommended water volume: up to 25L Important notes: - Use only a 5V/2A power supply. Insufficient current may result in improper heating. - Designed for use in tanks with as little as 2L water capacity. - For larger volumes (e.g., 4L), two units may be used simultaneously—each must be powered by a separate 5V/2A source. Do not connect multiple units to a single multi-port USB power source, as this may cause insufficient heating or failure. - Material: quartz glass - Color: black Package includes: 1 x Mini Aquarium Heating Rod Note: Color appearance may vary slightly due to lighting conditions and screen settings. Dimensional tolerance: ±1–3 cm.