Operating Steps: 1: pinch two sides of mouth of balloons with your fingers 2: cover inflation port with balloon 3: inflate balloon by pushing inflation port down 4: release inflation port when balloon size is suitable Product Specifications: Color: Rose Red Size: 18.5 x 12.5 x 11.5 (cm) Input voltage :110-120V. Pressure: 18000pa-22000pa, 1.75psi. ..