Solar Panel and USB Cable Charging:Built-in solar led lights with 3.7V 1500mAh rechargeable lithium battery, bulbs charged by solar panel or 5V DC Micro 5P USB plug, after fully charged, they will can be used_x005F_x000D_for highlighting: 5 to 7 hours; Medium light: 11 a.m.-1 p.m.; Low light: 19-22 hours. _x005F_x000D_ How to charge with 7W solar panel: place the solar panel outside under sunlight and at the same time keep the bulb connected to the panel cable for 6-8 hours, the charging indicator is red, the indicator of_x005F_x000D_full charge is green. _x005F_x000D_ 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 control OR press 5 times_x005F_x000D_the MODE button of the solar bulb, _x005F_x000D_ The light sensor mode only worked when the solar panel was connected to the solar led bulb. Automatically turn off the solar lights and charge during the day; and automatically turns on the bulb at night. _x005F_x000D_ High Brightness 20 LED Solar Light Bulb with Remote Timer: Dimmable Solar Powered LED Light Bulb with 20 High Brightness LEDs and 2835 High Quality LEDs; you can remotely set the hours 0.5/2/5/10 hours to automatically shut down_x005F_x000D_camping sunlight. In the daytime when the weather is good, connect the solar panel with the led bulb, _x005F_x000D_ The solar panel can convert solar energy into electric energy and store it in the solar led bulb battery. The charged bulb can be used as a mobile lighting lamp. _x005F_x000D_ Wide Application: The outdoor sunlight is ideal for indoor home lighting, reading, outdoor camping, hiking, fishing, cooking, working, car, shed, chicken coops, the barn, the breakdowns_x005F_x000D_power outages, hurricanes, storms, emergencies and blackouts, etc.