I bought this intending to use it, but never had the chance. It's also unopened. Dodow, a device that uses a 6 RPM rhythm to promote sleep. - Brand: Dodow - Product Name: Dodow - Function: Sleep-promoting device - Rhythm: 6 RPM - Usage Time: 20 minutes - Target Audience: People with insomnia - Barcode: 600684711009 Thank you for looking.