Basic treatment therapeutic mattress supports is a good for pressure ulcer therapy . which includes an adjustable pump that allows for individual caregiver comfort settings. Heavy-duty, bubble-style pad is heat sealed by uniform tooling make pad more durable . Voltage and Frequency:220V/50Hz 110V/60Hz Inflate size: 1900mm×900mm Pressure range: 15-20Kpa Endurable weight: 100Kgs Output flux: 4—7L/min Cycle period: 1 /5min(1 /6min) Thinkness: 0.35mm Height of sells: 6cm