vivo 4dOS- Ai Vivo 4D + 2D. 13)Do not use massager in close proximity to loose clothing or jewelry. 14)Keep long hair away from massager while in use. 15)Use heated surfaces carefully.Mayvivo-4d-massage-chair The Osaki Ai Vivo 4D Massage Chair is outfitted with benefits such as 4D + 2D Massage Rollers, Flexible SL