Features: *Charging easily: Users can charge the book light easily with any USB port devices; *Book Design: The book design light is really a great decoration for home, desk, table, bookcase, ceiling, etc. *Open freely: 360 degree open design, users can open the book at preferred angle; Open-off to change color; *Good durability: DuPont Tyvek delivers unparalleled strength in an ultra-lightweight paper material. *Portable and small, just bring wireless book anywhere you like; *Tender and changing color light on and beautify your life; *Amazing gift for your families, friends, lover etc. NOTE: Open and Close the book to get Color Changing Specifications: Name: led wooden cover book lamp Color: white/warm white Working voltage: 300mA DC5V Battery voltage: 3.7V/2500mA Charge voltage: 5V/500mA Charging time: 5H Working time: 8H Charging status: red light means charging, blue color means done Material: walnut cover/white maple cover + Dupont tear-resistant paper of united states Dimmer: no Book size: 215 * 165* 30mm(L * W * H) Item weight: 375g Package list: 1 * LED Book Light 1 * USB Cable