200W aquarium heater-This 200W aquarium heater Suitable for 40-50Gal aquariums, Common for fresh and sea. waterThe heater is 8.2 inches long, Voltage 110-120VPlease, choose the heater for fish tank that suits you according to the size. 【Unique Dual IPS Smart Chip】The aquarium heater features a dual-IPS intelligent temperature control chip system,offering reliable protection for your aquatic life. Two chips monitor in parallel; if the main chip fails,the backup seamlessly takes over to maintain precise temperature control,ensuring dual safety.Coupled with three-probe sensors,it monitors tank temperature in real time and triggers immediate automatic shut-off in case of low water or abnormalities,providing professional-grade stability for your aquatic environment. 【Precision,Energy-Efficient,Low-Power】The aquarium heaters offers three smart heating modes: a precise mode activating at a 1°F difference, an energy-saving mode starting at 2°F, and a low-power standby mode after reaching temperature,ensuring accuracy while saving energy for easier care. It automatically stops heating if lifted out of water or upon rapid temperature rise, displaying an error code via self-diagnosis for full safety. We protect every aquatic life as diligently as our own. 【External controller】The aquarium heater features a separate external digital LED controller.Unlike traditional built-in displays, our heating element is fully isolated from circuitry for enhanced safety, and never need to touch the water to operate.The controller shows real-time water temperature, adjustable from 59°F to 93°F with ±1°F accuracy.Easy operation and provides extra safety for your aquatic pets and household electricity, offering greater peace of mind in fishkeeping. 【Carefree service,guaranteed peace of mind】The AQUASMITH heater includes complete installation accessories for easy mounting on the tank wall or bottom. For any issues during use, contact our customer service team. We provide professional support within 24 hours, ensuring a seamless fish-keeping experience. 200W