Recent upgrade history
   (Minor) April 22, 2021 App upgrade : patch work (function improvement, Android V2.7.3, iOS V2.7.4)
   (Minor) April 6, 2021 (wear check, cry detection): patch work (function improvement, band V2.7.6, gateway V2.7.8)
   (Major) February 19, 2021 SW upgrade: performance improvement and stability improvement (Band V2.7.4, Gateway 2.7.6)

Major SW updates are available for Band(A0, Ver 2.7.4) , Gateway(C0, Ver 2.7.6) and App(Ver 2.7.2).
The major improvements are as follows. We appreciate your use of them. (New patch is April 6, 2021)

1. Band Firmware (Ver 2.7.4 : 2021-02-26 patch, Ver 2.7.6 : 2021-04-06 patch)
   -  Improved measurement status such as wearing check and reading data
   -  Increased heart rate and oxygen level measurement rate 

2. Gateway Firmware (Ver 2.7.6, Ver 2.7.8 : 2021-04-06 patch)
   - Improved Bluetooth stability with phone linkage
   - Improved firmware update stability
   - Improved Crying Detect 

3. App (Android Ver 2.7.2)
   - Improved stability of data, system status Information display
   - Decrease the volume of the crying alarm sound
   - Both Andriod and iOS canl be updated.