How to safely shut down or force shut down Inovo devices

Inovo I-05 V1 Inovo I-05 V1
Inovo I-05 Top Inovo I-05 Top
Inovo I-05 Candy Inovo I-05 Candy
Inovo I-05 Big Inovo I-05 Big
Inovo 1512 V3 Inovo 1512 V3