The HISENSE DB Series is a range of non-inverter air conditioners utilizing R32 refrigerant. Available in various horsepower options (1.0HP, 1.5HP, 2.0HP, and 2.5HP), these units provide cooling for different room sizes. As non-inverter models, they operate at a fixed speed, offering consistent cooling performance. The R32 refrigerant is more environmentally friendly compared to older refrigerants.