We present this brand new racing type high back office chair with a unique appearance and feel, unlike most office chairs on the market, it have a vibrator with remote control, slight vibration can reduce the fatigue. And If you don't want to use the massage function, you can roll up the data cable and put it in a small bag. This race chair has a higher backrest to support the entirety of your spinal column. And Our desk chairs offer a stable five-point base with a gas spring, allowing the use to adjust for varying heights to better meet the needs of your office or computer desk. Seat height: 17.3”-21”; Seat wide: W20.9”*D19.3”.