LOHOME(TM) Wireless Remote Control E27 Screw Light Socket Lamp Base LED Bulb Holder Cap and ON/OFF Remote Controller Switch (4 Lamp Holder) Wireless remote control lamp holder for E27 bulb. Up to 20 meters remote control distance in open ground. Intelligent learning code ability equipped, use freely when lost the remote. Adopt Surface Acoustic Wave (SAW) frequency stabilization technology, frequency is ultra-stable and reliable. Imported IC coding, there are Millions of different codes, and the neighbors will not cause similar products using the cross-holding phenomena.