As a starting point let's consider the Heart Rate Watch with 1.3 Inch Full Round Screen, also known as the Bakeey T30. This sports smartwatch boasts a 1.3 inch round screen, full touch operating mode, and an impressive IP68 waterproof rating.
With a battery life of approximately 1500 hours it seems to be a promising contender in the smartwatch market.

The standout feature of the Bakeey T30 is its IP68 waterproof rating which means that it is protected from dust and can be immersed in water up to a depth of 1.5 meters for up to 30 minutes. This is particularly beneficial for those who enjoy water sports or simply want to wear the watch in the shower without worry. The full touch operating mode also adds convenience to the user's experience. However, it is important to note that the product information does not mention any additional features such as GPS or SpO2 monitoring, which may be important to some users.

Nevertheless there are advantages and drawbacks to consider. The T30's waterproof rating and long standby time are definite pluses, but the lack of additional features such as GPS or SpO2 monitoring may be a downside for some users. It is also worth noting that the market reception has been mixed, with some customers receiving a different product than advertised and experiencing issues with refunds. However, there have also been positive reviews praising the watch's functionality and appearance.

All things considered the Heart Rate Watch with 1.3 Inch Full Round Screen appears to be a decent sports smartwatch with some notable features such as its waterproof rating and long standby time. However, the lack of additional features may be a drawback for some users. Without a doubt, it is important to purchase from a reputable seller to avoid any potential issues with receiving a different product or obtaining a refund. Ultimately, whether or not to purchase the T30 depends on the individual's specific needs and preferences.