I love the new addition to my night stand. The alarm clock can be used without an outlet. Simply just charge it up. It lasted about a week for me before I had to charge it again. The alarm clock is very easy to set up. My favorite alarm tone is the second one. It's soothing and calming for those unpleasant earlier mornings. I look forward to waking up in the morning to listen to it ring. Overall great buy and I highly recommend.