**About Battery - our clock is electric (cord included), but has an internal battery which helps automatically save setting in case of power outage. ✓ Warranty & Support - The words Dementia, Alzheimer's and Memory Loss are intentionally excluded from the packaging, great gift for the seniors or schoolkids. We stand behind the durability of our goods and offer an unconditional 12 months guarantee. This day clock has everything you're hopeing for, So Add It To Your Cart Now !!!. ✓ Auto-Dimming Options & Multi-Colors: Our calendar clock will auto dim from 8 pm to 6 am to help save energy and protect eyes. You can also adjust brightness levels and text colors (White/Yellow/Green/Orange). Tips: Green and Orange texts have lower contrast than White and yellow, especially during the night time. ✓ Easy to Set & Quiet for Sleepers: Our day calendar clock has only 7 buttons and simple setting interface, easy to set for the elderly. The clock has a nap button when you need to take a nap. No ticking sound GREAT for the seniors to get a deep sleep. ✓Auto DST & Time Reset: Our calendar clock is the only one to include Daylight Saving Time, which will automatically adjust time in March and December. The day clock is electric and plug-in-outlet, but it has an internal battery which helps reset time if the power is disconnected. ✓ Multiple Alarms & Custom Reminders: This digital clock with day and date for elderly comes with reminders of medication and drinking water, and you can custom reminders for your loved ones.It's a great aid to the seniors with dementia or Alzheimers. ✓ BEST CLOCK FOR SENIORS: The high resolution 7 inch digital alarm clock clearly spells out the full DAY of the WEEK, MONTH and DATE, also shows MORNING, AFTERNOON, EVENING, NIGHT, MIDNIGHT & BEFORE DAWN. By displaying BEFORE DAWN after midnight minimizes the problem of seniors getting up & start the day in the wee hours.