The SUNSUN JRB-230 is a 300W submersible aquarium heater designed for both freshwater and saltwater tanks. Here are its key features and specifications:
Specifications

Power: 300W
Suitable for tanks: 250-350 liters (up to 75 gallons)
Temperature range: 20°C to 34°C (65°F to 93°F)
Length: 33-34 cm (13 inches)
Voltage: 220-240V

Key Features

Fully submersible design
Anti-explosion glass tube for safety
Adjustable temperature control
Built-in thermostat for consistent temperature
Includes suction cups for easy installation

Benefits

Maintains stable water temperature for fish health
Suitable for large aquariums and various aquatic setups
Easy to read on/off indicator
Durable construction for long-term use
Energy-efficient operation

Additional Features

Over-temperature protection system
Automatic constant temperature function
Accurate temperature control within 1.5 degrees of set temperature

The SUNSUN JRB-230 300W submersible heater offers reliable performance and safety features, making it a suitable choice for maintaining optimal water temperature in large aquariums up to 350 liters