The RunFree Lite provides good performance even in environments with high ambient noise levels, it is ideal for use while jogging and outdoors.
TrueFree's F1 have ruined most other headphones for me. The absolute clarity offered by this unit blew my mind. The ability to listen to music while still having the ability to hear your surroundings completely cannot be understated, you can have conversations with others while still listening to music or go for a jog/run and still be fully aware of any outside sounds.
The crystal clear quality of voice transmission using BenQ's treVolo U is unparalleled.