1. 5-seconds later after the RO unit turned on /off, it will auto flush the RO  membrane for 15 seconds

2. Indicate when in/outout water flows

3. Indicate when water is full or producing

4. Auto flush for 15 seconds after the stofage tank is full

5. Remind the users to replace the filter every 90 days a time

6. Manual flush RO membrane function