Automatic switch with human sensor, compatible with 3-wire and 4-wire systems. - Model Name: WTK4431 - Color: Green - Type: Automatic switch with human sensor - Voltage: 3-wire / 4-wire - Price: 18,500 yen (excluding tax) Thank you for viewing! This is a new, unopened product. It is sold as a set of 3, but Individual sales are also possible, so Please feel free to ask.