Features: Universal E27 bulb socket adapters supports 110-220V voltages conversion, ensuring safe global compatibility with LED, CFL, and incandescent bulbs in any region. Heat resistant PP construction with secure twist lock base prevents loosening while coppers conductors deliver stable power transmission for long performances. for homeowners, electricians, and hospitality professionals needing voltages adaptation in residential or commercial lighting systems. Perfectly functions in living room, hotel corridors, retail displays, and outdoor fixtures where stable bulb mounting and voltages flexibility. This lamp holder base simplifies international lighting setups with not tool installation, eliminating regional voltages barriers for users. Specifications: Material: PP Color: White Quantity: 3Pcs, 5Pcs(optional) Product Weight: Single 80g Product Size: 79x79x38mm Applicable voltages ranges: 110V to 220V Package Includes: 3/5Pcs E27 Light Bulb Socket Holder note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the Pictures may not reflect the actual of the item.