Attach these safety lights anywhere - no need for a plug socket. Use on stairs, in hallways, bedrooms and bathrooms. When they sense motion from 10-feet away they switch on, automatically switching off after 30 seconds if no movement is detected. Set to activate dusk-to-dawn, their energy-efficient, battery-powered LEDs last for ages. Attach with adhesive pads or to any metal surface with built-in magnets (fittings included). No hammers, drills, or tools required. Indoor use only. Each requires 3x AA batteries (not included). H8 xW10 xD2.8cm.