Use:initialuse，findthebottomofthelamphasablackwaterproofbutton.Thebuttonispressedtoopen(ifthedayisnotsurewhetherornottoopenagain.Pleasetestinadarkhouse.Switchopen.Willlight)，andthenputasunnyplaceinthesuntorechargeatlightsensorwillautomaticallylightup InstallationTips:1.directraysofthesuncanbeplacedwhere(preferably6hourssunaday). 2.Installthefilllightwhenthebottomgravelhead，longbodyimmersedinwaterinordertoavoidlight. ProductSpecification: 1.ThelightsourceusesLED，longlife，donotneedtobereplaced;thedayandautomaticallyturnoffthelights，automaticcharging，automaticallylightupatnight. 2.Productsize:7x7cmThickness:5.2cm 3.rechargeablebattery:.AANI-MH300MA(enough)，including(charging6-8hours)---batterycanbereplaced! 4.1strawhatastigmatismLEDLightColor:White/colorfullight/bluewarmwhite1LED(optional) 5.Colorfullight:LEDwithredtricolorofgreen，bluecolorgraduallyalternatingcolor，incolorprocesswillproduceothercolors.Wecallitcolorfullight. 6.Material:CrystalIceGlass+ABSplastic 7.Waterproofgrade:IP68 8.ProductWeight:360G