Oh dear. I ordered a Motorola HS850 headset from Amazon and returned it because it didn't work and was a second-hand unit. When I ordered the Voyager 510 from Amazon (shown as 'Retail Packaged', not 'Bulk Packaged' like the HS850) I thought I would be receiving a brand new unit. Nope. It was 'Retail Packaged' and looked new until closer inspection revealed that the inside of the Microphone boom was worn. After charging for the recommended 3 hours the headset would switch on and last for about a minute before the low battery light came on and it would switch off. This one is going straight back to Amazon. I will not be buying another headset from Amazon and I'm seriously thinking about cancelling my membership.