But Jambra are not very comfortable for longer use and they have very poor batery life i have read.And i doubt that they can match sound isolation and sound leak of over ear Air - Fi Matrix2s. (thewirecutter.com)
Very bad Experience using MI506, it's waste in buying... it's not user friendly to operate, camera is very bad, poor batery back up.. (gadgets.ndtv.com)
Development of a new type of electrical batery with three times higher capacity per weight unit compared to the existing models. (dotearth.blogs.nytimes.com)