Electronically controlled continuous flow air conditioner with WLAN function. Target temperature setting and control via WiFi controller by smartphone, tablet or PC/MAC. Cooling and heating mode. Constant water temperature control. Water temperature control in freshwater and saltwater aquariums. Accurate temperature detection from 5°C to 35°C. Automatically turns on above or below a set target temperature. Warning email if temperature rises or falls below 2°C for more than 5 minutes. Continuously displays the current water temperature in operating mode. Use in the ambient temperature range of 10 °C to 38 °C. For 2000 liter aquarium.