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GTO, with a lightweight and stylish metal body, boasts built-in 31 sports modes, an IP68 waterproof rating, 15-day battery life, all-day heart rate detection, instant notifications and weather forecast.https://kospet.com/products/kospet-gto-smartwatch
Electronic watch
The basic part consists of electronic components. The working principle of electronic clocks is designed according to the physical phenomenon of　electricity generates magnetism and magnetism generates electricity . That is, the electric energy is converted into magnetic energy, and then the magnetic energy is converted into mechanical energy to drive the hour minute hand to run, so as to achieve the purpose of timing.
Transistor balance table
It uses dry battery as energy source, transistor as switch and cycloid hairspring as oscillating system.

https://kospet.com/products/kospet-gto-smartwatch