-waterproof mobile phone case -this has function protecting mobile phone from water in swimming pool, bathroom and sauna, etc. - as this product with \'\'blow air in\'\' type float in water this protect mobile phone from water and keep not to lose it. - you can communicate with other one in case state without pulling out mobile phone from case. Model:3 type(hd-171hd-172&hd-173) Size: Hd-171(9x19cm), hd-172(9x16cm), hd-173(9x20cm) Material: Flexible p. V. C Color: Blue, pink