Xiaomi Mi Air Purifier 3H Bought years ago, realised our air quality wasn't bad, so put in a cupboard. Filter states 82% remaining (239 days) Connects to wifi and is managed through Mi Home App, Google Assistant, and Amazon Alexa. Features an OLED touch display, a laser particle sensor, and a high-efficiency HEPA filter. Key Specifications & Features • Dimensions: 240 x 240 x 520 mm (approx. 4.8 kg net weight) • Effective Area: Covers rooms up to 26–45 m² • Clean Air Delivery Rate (CADR): 380 m³/h for particles and 60 m³/h for formaldehyde • Filtration: 3-layer 360° cylindrical HEPA filter removing 99.97% of 0.3μm particles • Smart Integration: Compatible with the Mi Home App, Google Assistant, and Amazon Alexa • Filter Lifespan: 6 to 12 months depending on usage Core Functions • OLED Touch Screen: Displays real-time PM2.5 levels, temperature, humidity, Wi-Fi status, and operational modes. • Laser Particulate Sensor: Detects microscopic pollutants and auto-adjusts fan speeds in Auto mode. • Quiet Operation: Sound levels range from 33 dB to a maximum of 64 dB. Youtube review : https://www.youtube.com/watch?v=XWKZwZ9WqJU&t=33s