Features: brand new and high quality The red wire is connect to the battery positive electrode, and the black wire is connect to the battery negative electrode. It can be used for LED ceiling lamp, wall lamp, or various lightings. Small and light, easy to carry.Easy to use. Excellent PCB board material, fine workmanship, durable There are no metal feet on the back of PCB, and the glass fiber insulation board has good insulation. Specifications: Material:PCB Color:White Light/Warm Light Input:DC3.0V-4.2V Power:5W Number of lamp beads: 28pcs Size:Approx.9.5x5cm/3.74x1.97inches Note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1x Light Panel Board