Main advantages:
* Fashion and luxurious design,
* Fashion and luxurious design,
* Powered by 3V battery, low power consumption module design
* Low battery warning to avoid power off without notification
* 10 year lifespan battery, no need to replace battery in 10 years
* Low battery warning to avoid power off without notification
* 10 year lifespan battery, no need to replace battery in 10 years