The mattress is continuously alternately inflated and ventilated through the double pipes, so that the spherical airbags fluctuate stably and alternately, constantly changing the contact point between the human body and the mattress, effectively avoiding continuous pressure on the skin, promoting blood circulation, and preventing the occurrence of bedsores. Features: Mattress head and tail lengthened design, prevents mattress from sliding. Double air nozzle design, airtight. One-piece massage, 135 spherical airbags are evenly stressed. Made of premium PVC material, skin-friendly and breathable, keep skin dry. Low noise air pump, energy-saving and high-efficient, air pressure adjustment button. The mattress is integrally formed, firm and reliable, with good sealing performance and no air leakage. Specifications: Material: PVC 3PLY Plug Type: 3 types (optional) Thickness: 0.3-0.4mm Number of Bubbles: 135Pcs Work Load: ≤135Kg Voltage: AC220V Frequency: 50Hz Input Power: 7W Pressure Range: 0-15Kpa (0-115mmhg) Air Pump Inflation Volume: ≥5L/min Exchange Time: 12 ±10% minutes Relative Humidity: ≤80% Relative Temperature: 5℃~40℃ Noise: ≤50dB Mattress Size: 1930 * 880 * 60mm / 75.98 * 34.65 * 2.36in Air Pump Size: 185 * 110 * 85mm / 7.28 * 4.33 * 3.35in Package Weight: 2900g / 102.29ounces Package Size: 280 * 195 * 165mm / 11.02 * 7.68 * 6.5in Note: There are 3 kinds of plug types for your choice, please choose one suitable for your country. Package list: 1 * Anti-decubitus Mattress 1 * Air Pump 1 * Plug Cable