Keeps water at a steady 26°C with automatic constant temperature protection to reduce stress for fish and other aquatic pets. Key benefits Reliable temperature control: Automatic constant temperature protection maintains a stable 26°C so your aquatic pets are less likely to experience temperature shocks. Portable power: USB powered — plug into a mobile phone charger or a power bank for convenient use in small setups, travel tanks, or temporary arrangements. Spacesaving design: At 52 mm long, this thumbsized heater fits into compact aquariums and nano tanks without cluttering the display. Safe construction: Made from explosionproof quartz material for secure operation and reduced risk in the aquarium environment. What this solves Prevents temperature drops or spikes in small tanks where large heaters are impractical. Offers a simple heating solution for shortterm setups, quarantine tanks, or situations without standard AC outlets. Provides unobtrusive heating that blends with compact, decorative aquarium layouts. Key attributes Function: Automatic constant temperature protection to hold water at 26°C. Power: USB powered; compatible with mobile phone chargers and power banks. Size: 52 mm length, thumbsized and lowprofile. Material: Explosionproof quartz for safe operation. Practical use scenarios Nano and shrimp tanks: Maintain a steady 26°C in smallvolume systems where precise, lowprofile heating is needed. Quarantine or hospital setups: Use with a phone charger or power bank to keep a temporary treatment tank at stable temperature. Travel, shows, or temporary displays: Power from a portable battery pack when a standard outlet is not available. Short operating note Connect the heater to a mobile phone charger or power bank as needed and position it appropriately in the aquarium. Follow standard aquarium safety and placement practices.