... desk sign ,LED message board 1-Powerful display ability 2-Different grade brightness and speed adjust 3-high quality LED desk sign ... of the 8 messages through the side of LED desk board button.9- Battery Type: Poly-Lion Battery with 2400mAh ... .High Quality and competitive priceComposing parts 1, LED desk board 1PCS 2, USB cable 1pCS 3, CD- ROM ... (current:1000mA, voltage: 5.5V) LED desk message sign/Board