もしもし、こちらはマイクです。

hello (e.g. on phone); excuse me! (when calling out to someone)

this way (direction close to the speaker or towards the speaker); this direction; here (place close to the speaker or where the speaker is); this one (something physically close to the speaker); I; me; we; us; this person (someone physically close to the speaker and of equal or higher status)

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

mike; mic; microphone

be; is