TwistLock Technology Guaranteed to never fall out Ultra-Soft Comfort Fit Ergonomically designed to avoid nerve-rich areas of the ear Sweat & Water Resistant Designed for active use Exceptional Sound C...
The basic version from BT only includes the bell, no wiring instructions, no cable, no clips etc. It needs to be fitted by an engineer. SXEY Electronics Ltd though have combined the BT bell with their...
AdvantagesFree (or cheap if you buy the full version)
AdvantagesExcellent down to earth teaching.
DisadvantagesNot for everyone.
Advantagesprices, performs well, lasts long