1.Switch to "AUTO" before the first time use the house numbers. Built-in sensor in the solar panel will turn on the light in dark and off in daytime. 2.With normal sunlight charge our address numbers can provide pproximately 8 hours illumination for your house daily. 3.The LED offer bright enough light, making your address numbers more visible in the darkness. It helps your visitors,emergency vehicles and parcel deliverers find your house at night. 4.Drill two holes and hang on the address plaque. No more dislocate visitor to your house with this address sign. Our house numbers can suit most weather condition and architectural style. 5.No wiring is required and it comes with a built-in battery and two screws.It could be mounted on the wall, the mail box,fence,etc. Clicked the on/off button,use a screwdriver to fix the screws/nails (come in the packages)in the wooden stake/wall,then hang the address marker by putting the two slots in the back of the main units into the screws. Color: black and whiteMaterial: ABS+PCMounting Type: Wall MountLight Type: LEDProtection level: IP65Voltage: 2 (V)Light source power: 0.3 * 10 (W)Scope of application: OutdoorCharging time: 4-6 hoursLighting time: approximately 8 hoursProduct Dimensions: 28* 18.3* 3.2cm