1. Personalized appearance design; 2. Back multi-point massage; 3. Fit the back of human body; 4. Massage to the thigh; 5. Elastic expansion of conjoined beautiful legs; 6. Plantar roller massage; 7. Bluetooth connection playback function. Carton Size: Chair back : 102.5x61.5x47cm; 29/38kg Chair leg: 91x71x25cm; 11.5/15kg Chair armrest: 102x53x28cm; 13.3/15.6kg PCS/CTN: 1set with 3 cartons N/W-G/W: 54kg-69kg 1x20`GP:45pcs; 1x40'HQ:111pcs. Technical Parameter: Rated Voltage: AC100-120V. or 220-240V; 50Hz./60Hz; Rated Power: 100W. Rated operating time: 15-30mins.