The Hindware Optimus Black 90 CM 1400 m3/hr Filterless Auto-Clean Wall Mounted Kitchen Chimney is a kitchen appliance designed to remove smoke, odors, and grease particles generated during cooking. Here are some features of this particular model:

1. Size: The chimney has a width of 90 cm, making it suitable for larger cooking areas.
2. Suction Capacity: It has a suction capacity of 1400 m3/hr (cubic meters per hour), which indicates its ability to effectively eliminate smoke and fumes from the kitchen.
3. Filterless Auto-Clean Technology: This chimney uses a filterless auto-clean system, which means it doesn’t require traditional filters. Instead, it employs an auto-clean mechanism to separate oil and grease particles from the air, keeping the chimney clean and maintaining its efficiency.
4. Motion Sensors: The chimney is equipped with motion sensors that enable touch-free operation. You can control various functions by waving your hand or using gestures, providing convenience and ease of use.
5. Touch Control: The touch control feature allows you to operate the chimney easily by using touch buttons on the control panel.
6. MaxX Silence Technology: This technology reduces the noise level of the chimney by approximately 32% compared to conventional models. It ensures a quieter cooking environment in your kitchen.
7. Design: The chimney is designed in black color, giving it a sleek and modern appearance that can complement various kitchen decor styles.

Please note that the information provided is based on the details you mentioned in your question. For the most accurate and up-to-date information, it’s recommended to refer to the product’s official documentation or contact the manufacturer directly.