Gammabai Music Light for Music Stand and Book Reading Light - Rechargeable Clip on E-Book Reading Light with USB Charging Cable - Music Stand Light - 4 LED Black Rechargeable design and eviornment friendly product. Only take 2 hours from empty to full batery Super value package: USB cable and AC Adapter included Mulpitle use: Clipping onto books and Ereaders such as E-book for night read; clip onto music stands,pianos,orchestra pits and more Bright control: 4 premium LEDs offer you 2 different brightness modes. Just press to adjust Worry free after sale service: Our customer service team is stand by for your enquire anytime, there is no question if you want to return the product and get your money back.