1. Both water heating & cooling, Min 8°C/ Max 40°C.Auto flow detect. 2.Advanced inverter technology, more cost effective compared to regular non-inverter heat pump. 3. Precise temperature setting, more comfortable for your swimming. 4. Lower running noise. 5. Applicable to swimming pool, SPA or Jacuzzi. 6. Titanium heat exchanger in PVC shell , virtually impervious to water chemistry damage. 7. World famous compressor. 8. Small water temp difference only 1-5 deg c. 9. Insufficient water flow protection & high/low pressure protection. 10. OEM design optional. 11. Add app function for free.