①. The lamp has a rotary switch. You can turn the lamp on and off by turning the switch clockwise. And the lamp can be rotated at least 90 degrees. You can also rotate the lamp to install it on the sloping roof. Note: The bulb is not included. ②. The lamp series features classic retro design and updated technology. The wall lamp is suitable for kitchen / dining room / bedroom / cafe / bar / club. ③. It is sturdy and durable, with very good workmanship. It is easy to assemble, has a classic texture, and its smooth design decorates the atmosphere well. ④. It is a vintage industrial style wall lamp, with an E27 socket, 220V, diameter: 17 CM; height: 25 cm; metal ceiling, diameter: 10 cm. The lamp can rotate 90°. ⑤. There is an on / off switch on the socket. If you already have a wall switch or dimmer installed, simply leave the rotary switch on and control it with your wall switch.