1. Smart control: The lamp circuit board charges the battery when there is sunlight during the day, and automatically turns on the LED lighting when there is no sunlight in the evening. 2. No need for human operation: Charging during the day and lighting at night, automatic cycle without human intervention, easy and convenient. 3. Circuit protection: RGB colorful 3.7V lithium battery dedicated control board provides overcharge and over discharge protection, safe and reliable. 4. Two modes: Changing color and fix color two modes are optional, and the suitable mode can be set according to the actual situation. 5. Wide Application: The solar lamp circuit board is suitable for circuit control of solar lawn lights, solar floor lights, solar spotlights, etc. The solar lamp circuit board charges the battery during the day and turns on the lamp at night, suitable for circuit control of solar lawn lights, solar floor lights, solar spotlights, etc. Model Number:solar lamp circuit board Size: 37 x 24mm Application battery voltage: 3.7V lithium battery Overcharge protection: 4.2V Over discharge protection: 2.8V Maximum input power of solar panel: 5V-6VLess than 6W Led: red+green+blue (3VLess than 1W) color:Green Material:ABS Package Contents: 4 x Solar Lamp Circuit Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.