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_x005F_x005F_x005F_x005F_x005F_x005F_x000D_for highlighting: 5 to 7 hours; Medium light: 11 a.m.-1 p.m.; Low light: 19-22 hours._x005F_x005F_x005F_x005F_x005F_x005F_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_x005F_x005F_x005F_x005F_x005F_x005F_x000D_full charge is green._x005F_x005F_x005F_x005F_x005F_x005F_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_x005F_x005F_x005F_x005F_x005F_x005F_x000D_the MODE button of the solar bulb,_x005F_x005F_x005F_x005F_x005F_x005F_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_x005F_x005F_x005F_x005F_x005F_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_x005F_x005F_x005F_x005F_x005F_x005F_x000D_camping sunlight.In the daytime when the weather is good,connect the solar panel with the led bulb,_x005F_x005F_x005F_x005F_x005F_x005F_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_x005F_x005F_x005F_x005F_x005F_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_x005F_x005F_x005F_x005F_x005F_x005F_x000D_power outages,hurricanes,storms,emergencies and blackouts,etc.