300W Submersible Fish Tank Heater with LED Temp Display & External Temperature Controller, Simple Deluxe

Simple Deluxe 100W Aquarium Heater How to set the temperature: Press set button to start the temperature setting. The LED display will start to flash, continue pressing set button, the number in LED screen will circulate from 20-34??68-94?? If you have found your desired temperature please stop pressing, the LED screen will stop flashing, then it will show the water temperature in your fish tank. It only starts heating when it has gone 2 degrees below the set temp, for example, if you want to get to the 26-27?(78-80?)range you should set at 28?(82?) Error code and LED display: Blue Light(constant temperature indicator light): temperature have reached setting goal, the heater will keep it. Red Light (working indicator light): the heater is now heating. E1: water shortage or wrong installation E2: the temperature went over 96?, stop heating Show water shortage protection E1 in the water, caused by the detection values of various water quality and can be set by yourself follow the steps b