28 LED FLEXIBLE USB & BATTERY 3 MODES CLIP-ON LIGHT DESK LAMP BULB FOR LAPTOP PC A 28 LED clip-on light lamp.It has three light models and two powered methods.3-step brightness adjustable:4LED/16LED/28LED.2 powered is battery powered or USB.And it has a clip, can be clip-on table/PC/bed and so on.It's also a desk lamp,perfect for home use,camping,BBQ and other outdoor activities. Product Features 100% brand new and high quality! 28pcs super bright LED bulbs,With 50,000 hours lifetime 3-step brightness adjustable:4LED/16LED/28LED Flexible and swivel metal neck Clip-on table/desk/bed and grill Perfect for home use,camping,BBQ and other outdoor activities Power:4x AA batteries(batteries not include) 4x AA batteries opearting time with 4 LED-around 30 hours 16 LED-around 8 hours 28 LED-around 5 hours 5.0V USB DC Socket Size:400mm x 14mm 5mm USB cable lenght:1.2m Package includes 1x 28-LED clip-on light lamp 1x USB cable