Low Voltage And Fully Electronic. 6.5' Sensor Cord.;Dual Alarm With Light And Sound To Alert Any Malfunctioning;Magnet-suction cup support mount for sensor, also includes cable clamp for cord;Insensitive To Surface Movements Of The Waves;Versitile. Can Be Used For Any Size Aquarium Or Sump. Adjustable Flow Rate Supply Pump Sold Seperately. Kindly refer user manual and instruction video for reference.