Mbe has a rather elaborate consonant inventory compared to the Ekoid languages, presumably due to contact from neighbouring Upper Cross River languages.
All Mbe consonants apart from the labial–velars (kpɡbw) and n have labialised counterparts. (/jʷ/ is presumably [ɥ].) In addition, the non-labialised peripheral stops (mpbkɡ; palatalised ŋ would be ɲ) and the liquids (lr) have palatalised counterparts.
m mʷ mʲ
n
ɲ ɲʷ
ŋ ŋʷ
p pʷ pʲ
t tʷ
k kʷ̜ kʷ̹ kʲ
kp
b bʷ bʲ
d dʷ
ɡ ɡʷ ɡʲ
ɡb
ts tsʷ
tʃ tʃʷ
dz dzʷ
dʒ dʒʷ
f fʷ
s sʷ
ʃ ʃʷ
r rʷ lʲ
l lʷ lʲ
j jʷ
w
There are a few consonants that only occur in ideophones, such as /fʲhʲ/.
An interesting additional contrast is between fortis and lenis/kʷ/. Fortis (long?) /kʷ̹/ half-rounds a following vowel such as /e/, whereas lenis /kʷ̜/ does not. This distinction may be being lost. (Blench)
Tone
Tones are high, low, rising, falling and a downstep; rising and falling may be tone sequences.
^Blench, Roger (2019). An Atlas of Nigerian Languages (4th ed.). Cambridge: Kay Williamson Educational Foundation.
^Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2017). "Ekoid–Mbe". Glottolog 3.0. Jena, Germany: Max Planck Institute for the Science of Human History.