... .5x5cmMaterialABS plasticColorblue,black,red color,can customizeUnit weight19gUsage for light,very convenience,pocket keychain,for promotion gifts1. Ideal for ... solar panel:5 yearsTime to full charge :Under the Strong light(not only solar light),need 7-8 hours can be full ... the button,the led will light. It can always be a good gift. The back side(the same side of the power on/off Button) of the ...