The mattress continuously and alternately inflates and ventilates through double tubes, so that the spherical air bags fluctuate stably and alternately, constantly changing the contact point between the human body and the mattress, effectively avoiding continuous pressure on the skin and promoting blood circulation. Prevention features: The head and tail of the mattress are lengthened to prevent Mattress slides. Double air nozzle design, seamless sealing. Integrated massage, 135 spherical air bags receive even force. Made of high-quality PVC material, it is skin-friendly, comfortable and breathable, keeping your skin dry. Low-noise air pump, energy-saving and efficient, air pressure adjustment button. The mattress is formed in one piece, which is firm and reliable, has good sealing performance and does not leak air. Specifications: Material: PVC 3PLY Plug-in type: 3 types (optional) Thickness: 0.3-0.4mm Number of bubbles: 135 Working 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: 50dBM Mattress size: 1930 * 880 * 60mm / 75.98 * 34.65 * 2.36in Air pump size: 185 * 110 * 85mm / 7.28 * 4.33 * 3.35in Packing weight: 2900g / 102.29 ounces Packing size: 280 * 195 * 165mm / 11.02 * 7.68 * 6.5in Note: There are 3 plug types for you to choose, please choose the one that suits your country /area. Packing list: 1 * Anti-decubitus mattress 1 * Air pump 1 * Plug cable Our products are made of the highest quality materials and designed to provide you with the best user experience. We strive to ship all orders within three days of purchase, with an estimated delivery time of 8-15 days. When shopping, please note the size and dimensions of the product to ensure it meets your needs. In the title and we've provided detailed information about the product, including its features and specifications. We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please don't hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. we hope you like it