This is the portable seated vibrating plate that helps relieve minor aches and pains and support lower body muscle recovery. A technology once used by Russian cosmonauts to avoid the pitfalls of muscle atrophy while in space, vibration training has been proven to help increase bone density. Its vibrating platform pulses at 10 frequencies between 20-40Hz, a range shown to improve blood and lymphatic fluid circulation. Rechargeable battery provides up to four hours of use from a six-hour full charge using the included AC adapter. 16 1/2" L x 17 1/2" W x 4 1/2" H. (9 1/2 lbs.)