1~5 Gangs Wireless Light Switch 1.Reliable:300,000 times 2.Battery ... with a remote controller in ceiling) is the best solution for any light switch installation where running ... holes into walls, install conduit, or fish wires. Features 1 . Less materials, green environmentally, friendly.2 . Place ... more technological.4 . E-start, no sparkle in switch.5 . Suitable for home, office, hote,l factory, hospital ...