This is a used Panasonic CS-S13JKH indoor air conditioning unit with a 1.5HP inverter. It features a patrol sensor and ion air purification technology. The unit is being sold as a second-hand item ("TERPAKAI" indicates used in Malay). The inverter technology improves energy efficiency compared to non-inverter models. The patrol sensor likely detects and responds to air quality issues, and the ion air conditioner function is designed to improve air quality.