Product Name: Breathing Trainer Product model: SMBT-1 Product structure: main body and blowpipe Product size: 46x45x132mm Use crowd: children, adults, the elderly Color: blue Material: plastic Package Contents: 5 x Breathe Trainer Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in a little different from the real thing. The measurement allowed error is +/- 1-3 cm.