Mattress specification: 1. MATERIAL: NYLON WITH PVC INSIDE 2. THICKNESS: 0.40MM 3. SIZE: 78" x 36"(INFLATTED) 4. HEIGHT OF INTERCHANGEABLE GASBAGS: 4.3" 5 .NUMBER OF INTERCHANGEABLE GASBAGS: 18Pump specification: 1. Size: 9.8" x5.1" x3.7" 2. Weight: 1.5KG 3. Voltage: AC 220V/110V 4. Frequency: 50HZ/60HZ 5. Power: 10W 6. Pressure range: 12Kpa 7 Air output: 250L/H 8. Cycle time: 10 minutes