Marpac Sleep Mate 980A Sound Screen White Noise Machine 2 All-natural white noise generator that uses a real fan to create the sound of rushing air without producing a draft. Brand: Marpac Function: Creates a soothing, natural fan-based white noise to mask disruptive sounds, aiding sleep, concentration, and privacy. Mechanism: It features an internal fan, and users can adjust the tone and volume by twisting the cap and collar. Dual-speed (Dohm-DS) versions Manual: https://images.vat19.com/manuals/sleepmate.pdf Model 980A 117Volts A.C. 40 Watts or Less 50-60 Hertz Made in the USA Condition: Preowned and in good working condition. Has been cleaned and refurbished.