Solar panel and USB cable charging: Built-in solar LED lights with 3.7V 1500mAh rechargeable lithium battery, light bulbs charged by solar panel or 5V DC Micro 5P USB connector, after full charge, they can be used to highlight: 5 to 7 hours; Medium light: 11.00-13.00; Low light: 19-22 hours. How to charge with a 7W solar panel: place the solar panel outside in sunlight and at the same time keep the light bulb connected to the panel cable for 6-8 hours, the charging indicator is red, the full charge indicator is green. 4 light modes and light sensor function: solar powered bulb with 4 modes: high 300LM/medium 150LM/low 75LM/SOS; How to enter light sensor mode: press the AUTO button on the remote OR press 5 times the MODE button on the solar lamp, The light sensor mode only worked when the solar panel was connected to the solar led light. automatically turn off solar cells and charge during the day; and automatically turns on the bulb at night. 20 High Brightness LED Light Bulbs with Remote Timer: Dimmable solar powered LED light with 20 high brightness LED lights and 2835 high quality LED lights; you can remotely set the hours 0.5/2/5/10 hours to turn off automatically camping sunlight. In daytime when the weather is good, connect the solar panel with the led light, The solar panel can convert solar energy into electrical energy and store it in the solar lamp's battery. The charged bulb can be used as a mobile lighting lamp. Wide Application: The outdoor solar light is ideal for indoor lighting, reading, outdoor camping, hiking, fishing, cooking, work, car, shed, chicken house, barn, power breakdowns, hurricanes, storms, emergencies and power etc.