Using your Sonic-FX™

Why does my Sonic-FX™ keep turning off after only a couple of minutes?
The Sonic-FX™ has an automatic shut-off feature after two minutes.
Wed, 18 Apr, 2018 at 4:10 PM
My Sonic-FX™ makes a weird noise about every 30 seconds, is that normal?
The Sonic-FX™ is designed to be used with the Quadrant Method of brushing, which means you switch from one quadrant of the teeth to another every 30-seconds...
Wed, 18 Apr, 2018 at 4:12 PM
Are the bristles soft, medium, or hard?
The bristles are soft nylon and of varying lengths for optimal cleaning of the surfaces of your teeth as well as in between teeth. 
Wed, 18 Apr, 2018 at 4:14 PM
How long will the battery last when off the charger?
The battery (if on a full charge) will last about two weeks with regular twice-a-day use before needing a full charge. 
Wed, 18 Apr, 2018 at 4:15 PM