The unit plugs directly into the 3 pin plug socket and there is a sensor on the side that illuminates the clock as soon as the light starts to disappear outside.
uscce Small Digital Clock for Bedroom: 6 Dimmable Brightness 4 Alarm Volume - Plug in Clock with Easy Operation for Bedside Desk
4-in-1 Wireless Charging Station,Bright Night Light Plug In One Wireless Charger 15W Power Digital Alarm Clock Temperature Display Night Light Functional Wireless Charging Halloween Projector (White)
LED Battery Wall Clock, Visable in the Night, No Plug In, Large Display Digital
Azyh Digital Alarm Clock with Green LED Display for Bedroom, Loud Alarm Clock for Heavy Sleepers, USB-A to Type-C-Plug-In Electric Desk Clock with Adjustable Volume, Brightness, Snooze, 12/24HR,Gifts
CAZOKASI DST Plug-in (No Battery), Power Outage Memory Digital Clock with Date and Day of Week for Elderly-12 Alarms Medication Reminder Dementia Alzheimers Clock Calendar with Extra Large Display
MeesMeek Projection Alarm Clock for Bedroom: Digital LCD Clock with 180° Projector Date Temperature Snooze 12/24H and Weekend Mode, Plug-in Bedside Clock with 2-Levels Volume for Kids Seniors Adults
