SWITCH ON/OFF AND LUMEN ADJUSTMENT•  The Rechargeable Floodlight is equipped with an ON/OFF switch with mode function locate on the back side of the Rechargeable Floodlight.•  The LED Rechargeable Floodlight's brightness is adjustable.With press ON/OFF switch •  1st press: 100% brightness; •  2nd press: 50% brightness; •  3rd press: SOS flashing; •  4th press: OFF.Discharging time: About 3 hours for 100% brightness;About 5 hours for 40% brightness;Safety Instructions For Charger) •  Use the charger provided with the tool only to charge the battery •  Never attempt to charge non-rechargeable batteries. •  Have defective cords replaced immediately. •  Do not expose to water. •  Do not open the charger. •  Do not probe the charger. Safety WarningThis is not a toy; children should not permit to use it. This is a DIY product, all electronic parts fixed already, any intention of opening the light or changing the design of the floodlight is prohibitive. Do not attempt to replace or change or the diode lights! If the protective glass is cracked or broken, it must be replaced before the Rechargeable Floodlight can be used again. USB OUTPUT The USB DC SV lA output socket (8) can use for all kinds of device which can be charged by USB cord (b), such as mobile phone, MP3/MP4, Bluetooth headset etc. NOTE: The USB output will stop output automatically if the total working current of the total connected device exceed the limit.4