Features: 1 to install, no devices required, just screw the extender into the present e27 socket and establish the light bulb 2 use of excessive conductivity aluminum supplies with good conductivity and effort functionality 3 single lamp head can rotate and fold 360 ° freely, alter the light fixtures angle, and decrease the light to shine on particular places four e27 lamp holder has 2/3/4 e27 lamp holders, with multiple specifications accessible for choice five screw mouth, compatible for many mild bulbs, would be smoothly replaced and used Parameters: Model: e27 threaded lamp holder Material: metal+plastic Specifications: e27 one to two/e27 one to three/e27 one to 4 (optional) Rated voltage: 110-220 (v) Power: 20w in step with lamp head Rated current: 5a Heat resistant temperature: 120℃ Applicable mushy bulbs: incandescent lamps, led lamps, energy-saving lamps and varied screw mouth lamps, correct for laptop computer desks, bedrooms, learn rooms, and so forth Package include: Lamp holder*1