* As thin as 2 x credit card
* BLE 5.0
* IP67 waterproof
* Big capacity, battery >3 years
* Sound boost design, sound volume >95dB
* NFC supported, can use as door access, payment and etc (optional)
* BLE 5.0
* IP67 waterproof
* Big capacity, battery >3 years
* Sound boost design, sound volume >95dB
* NFC supported, can use as door access, payment and etc (optional)