Yes, Micromax Canvas 1 is available only in the Black color but in 2 different variants. Matte Black & Chrome Black.
Yes, since Micromax Canvas 1 runs on the latest Android 7.0 OS - there is multi windows support.
No. Micromax Canvas 1 does not support fast charging.
Micromax Canvas 1 comes with 2500 mAh Li Polymer battery which offers talk time of up to 7 hours and almost 180 hours of standby period.
Yes, Micromax Canvas C1 does have the wi-fi hotspot function.