4. Power is supplied by an internal rechargeable battery 1000mA lithium-ion cell, a charge 5-10 hours of continuous stay on to light. It is fully charged need in around 2-3 hours , by an external voltage, or through the USB host. Easy to plug into any available USB port laptoptebook/desktop/power bank/Solar charger to power the lamp or charged.
"Red"light signal : Battery is charging status icons.
"Green"light signal : Battery is now fully charged.
"Blue"light signal : The lights come on.
5. Material: aluminum. ultra-thin, high textured experience, Durable full metal body and multi-angle adjustable head and arm.
LED Eye-caring Table/Desk Lamps dimension :275*46*5mm / Outer packing dimension :320*65*23mm