The product built‎-in device for mini generating electricity‎,‎ illuminated by water without battery‎,‎ the light will go out when the water was turned off‎.‎This item will charge its color by time The light can change one color every 1 to 2 seconds so that the rainbow colors are showing gradually‎.‎Two universal adaptors ‎(‎included‎)‎ fits most water faucets‎.‎The products have excellent function in the are of water saving‎.‎ In the connection of the top‎,‎ setting a water saving and filter systems‎.‎Type‎:‎ LED Water FaucetMaterial‎:‎ ABSLED Qty‎:‎ 1 PcLED Color‎:‎ 7 ColorsFaucet Type‎:‎ Bathroom‎,‎ Kitchen‎,‎ etc‎.‎Faucet Length‎:‎ 55mm/2.17‎"‎ ‎(‎Approx‎.‎‎)‎External Diameter‎:‎ 28mm/1.10‎"‎ ‎(‎Approx‎.‎‎)‎Screw Thread Diameter‎:‎ 22mm/0.87‎"‎ ‎(‎Approx‎.‎‎)‎Connecter Size‎:‎ 22mm/0.87‎"‎ ‎(‎Approx‎.‎‎)‎Adapters Size‎:‎ 20mm/0.79‎"‎‎(‎Approx‎.‎‎)‎‎,‎ 24mm/0.94‎"‎‎(‎Approx‎.‎‎)‎Features‎:‎ Rainbow Light‎,‎ Automatically ChangeNotes‎:‎1‎.‎ Due to the difference between different monitors‎,‎ the pictures may not reflect the actual color of the item‎.‎2‎.‎ Compare the detail sizes with yours‎,‎ please allow slight difference due to manual measurement‎.‎