Anything goes:
++ Super small and light
++ Battery charge indicator on the iPhone (without app, right next to the Bluetooth icon)
++ Short voice message on the status of the headset
++ Very good voice quality, no cracking noise &
++ Quick and easy connection to the phone
++ Extremely long battery life
++ Very well he did not feel comfortable even after hours
++ "Real" on / off switch
Drawback I could not find so far. for just 20, - ne real buy recommendation !!