Smart Scent Air Machine Black Key benefits Covers large spaces up to 300 cubic meters for consistent, even scent diffusion. Flexible operation with Bluetooth remote control, programmable timing and adjustable concentration to match different environments and schedules. Dual power options for placement freedom: use USB Type C 5V power or three D batteries when mains power is not available. Quiet and unobtrusive operation at 30 dBA or below, suitable for public and professional spaces. Durable PP construction and two installation modes allow either flat placement or secure wall mounting. What it does This smart scent air machine uses cold air diffusion to distribute fragrance through a single aromatherapy outlet. It is designed for medium to large indoor areas such as elevators, hotel lobbies, office buildings, conference rooms, beauty salons, restaurants, cinemas, spas, and leisure clubs. The unit provides precise control over scent delivery with five programmable time slots, concentration settings, and multi segment timing via Bluetooth remote control. Key specifications Color: Black Item type: Smart Scent Air Machine Material: PP Size: Approx. 184 x 137 x 66 mm Essential oil bottle capacity (empty): 150 ml Coverage: Up to 300 m3 Number of aromatherapy outlets: 1 Modes: 5 time slots, concentration adjustment, multi segment timing, Bluetooth remote control Installation: Flat or wall mounted Noise level: <= 30 dBA Power supply: USB 5V (Type C) or 3 x D batteries (batteries not included) Battery indicators and safety lock included Battery life: Up to 100 days under typical settings Package contents 1 x Smart Scent Air Machine 2 x Instruction manuals 2 x Screws 2 x Plastic expansion tubes 2 x Accessories 1 x Wall mounting plate How to install and start Open the cover by pressing and holding the button. Pull out the atomization head and essential oil bottle together. Unscrew the bottle by rotating clockwise, add essential oil, then reattach by rotating counterclockwise. Press down on the area labeled PRESS to open the battery compartment, insert 3 D batteries following the correct polarity, close and lock the compartment, then the cover. For wall mounting, fix the wall mounting plate to the wall using the supplied screws and expansion tubes, then hang the device on the backplate holes. Practical use scenarios Hotel lobby: Set timed scent cycles during peak check in and quieter cycles overnight to maintain a welcoming atmosphere with minimal staff intervention. Conference room or office building: Use concentrated bursts before meetings and lower background scent during working hours to keep shared areas pleasant. Spa or salon: Mount on a wall to deliver consistent fragrance throughout treatment and waiting areas while keeping the unit out of the way. Why customers choose this device Large coverage and quiet operation make it suitable for commercial and public spaces. Simple refill and battery options allow flexible placement without rewiring. Programmable scheduling and Bluetooth control let you automate scent delivery for different times and events. Solid PP construction and included mounting hardware make installation straightforward and reliable.