When you Activate Power Saving Mode to save battery, you are not allowed to activate ‘Vibration’ for incoming calls, SMS’ and emails. Power Saving Vibration solves this problem; When Power Saving Mode gets activated, Power Saving Vibration automatically sets vibration option to ‘ON’ for active profile. Even if you change profiles while Power Saving Mode is Active, vibration option will still ‘ON’. Compatible with S^3 / Anna / Belle Smart Phones.