REACHER Small Digital Alarm Clock with USB Port Phone Charger,Large Red LED Number, Simple Clock Easy Snooze and Time Setting Battery Backup for Desk,Bedrooms(Black) [Update Version];

Right and ideal for home, office, car, better clock for kids and elders, with 4 main buttons, easy to set up.
Clear LED display for checking time
Easy-read and clear digits showing the hour, you won't miss any important date.

Two USB Ports: convenient and special
"Achieve two things at one clock", one USB port powers the clock for displaying time and activating alarm function; another charges your phone or other devices.

Classical and progressive ringing
Morning hours are the best time of the day, clock wakes up your dream and refreshes your morning like no other can.

Battery Backup: memorize time during a power failure
Please note : You need to connect the clock through the USB cable to a computer or an 5V adapter (included) to display time and use the alarm function.
Specifications
Time set: 12-hour format
Alarm: last for 8 minutes
Snooze: every 8 minutes, up to 10 times
Powered by: power supply by USB adapter; 1.5 AA battery
(not included) for maintaining time.
Product Dimensions: 143 x 73x 48 MM

Troubleshooting
Why clock don't work when plug AA battery in ?
AA battery is only for memory accurate time,all other functions need to plug in the adapter , included time showing.
Why screen flashing when first turn on or unplug the adapter ?
It means that you need to set the right time.
Why plug AA battery ?
AA battery is for clock memory the accurate time when adapter unplug .
When and how reset the clock ?
Please unplug both the AA battery and adapter to reset the clock when clock is any abnormal situation, then plug both battery and adapter in to set the clock.