Description: HIGH QUALITY: LED Sign made of high quality material, the size is 9cmx3cmx0.6cm/3.54inchx1.18inchx0.24inch, USB RECHARGEABLE: Simply connect to the USB port when power is out. EASY PROGRAMMING: LED matrix display both mobile and computers can change characters ,download and install for " LED Display" on Android. Search for "Mini LED Display" in phone.After the software is installed successfully, "LeShanLED" will be displayed. SCROLLING MESSAGE : support multi language text, can store 550 Chinese characters or 750 English characters, 8 speeds, 1-8 step by step to speed up the display speed, software settings can be made, lightly press the information button on the side of the badge, and the conversion is different display information, WIDELY USED: Led sign message board is widely used in supermarket chest guide, KTV, bar staff, restaurant and hotel staff, substitute driver, exhibition, business meeting, company celebration, wedding, birthday party, party, concert, etc. Specification: Charging Time:2 Hours Battery:200mah 3.7v Working Time: 12 Hours( Full Brightness ) 24 Hours(25% Brightness) Size Chart: 9cmx3cmx0.6cm/3.54inchx1.18inchx0.24inch Package Includes: 1  LED Sign Board Note: Please allow slightly errors due to manual measurement and different monitors.