Key benefits Stable, handsoff temperature control: Intelligent heating control keeps tank water at a steady 26°C, creating a consistent tropical environment ideal for betta and other small tropical fish without manual adjustment. Clear operational feedback: Red/green status indicator lights show when the heater is actively warming or has reached target temperature, so you always know the heater's state at a glance. Safe, durable construction: Crackresistant, shatterproof body with a rubbersealed waterproof design provides leak operation and added electrical protection for reliable, longterm use. Compact and unobtrusive: Designed for desktop aquariums and small 3L tanks, the heater takes up minimal space and preserves aquarium aesthetics while maintaining water temperature. USBpowered portability: Runs from a USB power source so you can provide steady heating without a wall outlet, making it convenient for travel or locations with limited power access. Features and performance Fixed 26°C set point with intelligent control to maintain a healthy tropical environment for small aquarium species. Red/green status indicator lights for easy monitoring of heating activity. Constructed from crackresistant materials and a shatterproof body; rubber sealing for waterproof protection and electrical safety. Compact form factor sized for 3L desktop aquariums; lightweight and discreet in small setups. USB power input enables operation from USB power sources without needing a dedicated AC outlet. Practical applications Small desktop or office tanks: Maintain a stable 26°C for a 3L betta or nano community tank on a desk or shelf without bulky equipment. Travel and temporary setups: Provide safe, consistent heating for short trips, temporary housing, or quarantine tanks where traditional outlets are not available. Dorm rooms and compact living spaces: Keep water temperature steady in small aquariums where space and outlet access are limited. Why customers choose this heater Delivers a reliable, consistent 26°C environment tailored to small tropical aquariums. Offers visible status lights for simple monitoring and peace of mind. Built for safety and durability with waterproof sealing and impactresistant materials. Small footprint and USB power make it a practical solution for compact, portable, or outletlimited setups.