Specification: Size of controller: 89mm x 55mm x 44mm.  Power voltage: AC220V.  Power consumption: less than 2W.  Limited running time of relay output 1: 0 to 720 minutes settable via App. Each setting progresses is 5 minutes, 0, 5, 10, 15, .............710, 715, 720.  Time delay setting of relay output 1: 0 to 30 seconds settable via App.  Relay outputs: two relay outputs（normal open).  The contact current capacity is 10A for resistive load and 2A for inductive load. It can control 2000W resistive load or 500W motor /water pump. Larger loads require AC contactor expansion.  Working environment: -10℃ to +50℃.  WIFI 2.4GHZ b/g/n, not support 5G WIFI.     Main Features: 1. Real-Time Supervision: APP can display the current water level.  2. Turn on/off equipment (relay 1) remotely via App. Users can also control it on/off by manual switch button B.  3. Two relay outputs: Relay 1 control water level, Relay 2 for dry heating protection.  4. Preset'Add water' or 'Pump water' working mode, can auto turn on/off relay 1 when it reaches to the preset water level value.  5. Set upper and Lower limit value of water level alarm via APP, real-time push alarm notification to users' smartphone.  6. Can set relay 1 running or delay working time.     Package included: 1 x  English manual instruction.  1 x  wifi water level controller.  5 x water level sensors with different cable lenth.     Remark: White cable: 3.5 meters.  Red cable: 3.1 meters.  Yellow cable: 2.3 meters.  Green cable: 1.1 meters.  Blue cable: 1 meter