GT30 is a multi-functional Android smart Watch. It is made of zinc alloy + ABS steel. Users can communicate through Bluetooth calling from Android mobiles. This watch supports a 3D gravity sensor and IP67 water-resistant operation to protect against heavy rain or hand washing. It can be used for multisports mode. The watch has a very durable battery life that lasts for 15 days. This watch can measure heart rate, blood pressure, and oxygen. Note- You can't drown this watch to water. If you did it will be water damaged.