Description:Product material:Metal(Aluminum)+Electronic components Product size:9.8cm Length，Lamp top diameter:3cm，Lamp bottom diameter:2.5cmColors:blackBright degree:range 100MBulb's lifetime:100，000hoursVoltage:4.5V (3X1.5V)Battery:3XAAA(without battery for the transport)On-off Style:touch-toneLighting Time:Hard Light(3 hours)Low Light(6 hours)