Vivo V11 has a dual rear camera set up. The primary 16MP rear camera has an aperture of f/2.0 while the secondary 5MP rear camera has an aperture of f/2.4.
Yes, Vivo V11 has a 3.5mm headphone jack.
Vivo V11 comes with MicroUSB port.
No. Vivo V11 has a mono speaker set up.