How to safely shut down or force shut down Zuum devices

Zuum Stellar Plus Zuum Stellar Plus
Zuum Stellar Mini Zuum Stellar Mini
Zuum Stellar Z Zuum Stellar Z
Zuum Stellar Max Zuum Stellar Max
Zuum Aura X Zuum Aura X
Zuum Zen I Zuum Zen I
Zuum Stedi Zuum Stedi
Zuum Pro I Zuum Pro I
Zuum Magno Zuum Magno
Zuum M50 Zuum M50
Zuum F45 Zuum F45
Zuum E60 Zuum E60
Zuum E45 Zuum E45
Zuum E40 Zuum E40
Zuum Covet Zuum Covet
Zuum Blaze Zuum Blaze
Zuum A918 Zuum A918