Feature:1. Bluetooth APP Control: This sign supports APP control, downloads the APP and connects to Bluetooth, with many interesting patterns and animations, and will be constantly updated.2. Flexible LED Screen: The LED sign screen is flexible board design, light and thin, and can be installed on hats, backpacks, shoes, cabinets, attached to car window or other objects.3. Battery Powered: This LED sign features a built in 3.7V 250mAh polymer lithium battery, and equipped with a USB cable for charging, making it easy to use anytime, anywhere.4. DIY Design Function: You can DIY design text, graffiti, animation, etc. on this programmable sign to suit your creation style, and you can also adjust the brightness and display mode.5. Wide Applications: This LED sign is widely used for car advertising, shops, bars, game rooms, cycling, or Christmas, Halloween, parties, birthday, and other holiday decorations.Specification:Item Type: Programmable LED SignLamp Board Size: Approx. 170 x 70mm / 6.7 x 2.8inWeight: Approx. 60g / 2.1ozBuilt in Battery: Polymer Lithium Battery 3.7V 250mAh (included)Light Source: RGBMaterial: Electronic ComponentsCharging Method: USB MicroControl: Key SwitchProgramming: Bluetooth APP.Package List:1 x LED Sign1 x User Manual1 x USB Cable