Press the black switch under the product sensor to enter the start-up mode and the first gear working mode. First gear mode: charging and standby in the daytime, not working. Working at night. When sensing someone, red and blue warning lights flash + alarm sound. Second gear mode: charging in the daytime, standby, not working. Working at night. Only red and blue warning lights flash when sensing someone. No alarm sound. The third mode: charging and standby during the day + all day induction work. When sensing someone, red and blue warning lights flash + alarm sound. The fourth mode: daytime charging + standby + all day induction work. When sensing someone, only red and blue warning lights flash. No alarm sound. Easy to install: No wires required, perfect for outdoor lighting,such as orchard,pasture,home,farm,barn,villa,yard,fence,installation is simple and convenient. Just need to find a place where the solar panel can absorb enough sunshine and fix the light with supplied screws onto it. Solar Warning Light: The solar warning light built-in polysilicon solar panel,It competely charges from sunlight, you can say goodbye to high electricity bill .It auto charge by sun at daytime and auto turn on at night. Our solar warning strobe light make of high quality ABS material,waterproof and durable, withstand all kinds of terrible weather all round the year, such as raining, snowing, hot temperature. Available all seasons. Material:AB+PS. Product Size:10.5*13*4cm.