1、There are options for one-way, two-way, three-way, or four-way, which can be selected according to your needs. 2、Can be used in combination with other types of switches or wall sockets. 3、Timer function, can set the on or off time, and can also set the countdown on/off time. This switch can be voice controlled or remotely controlled through a mobilephone app, making your dailylife smarter and more convenient. (Note: Need to be used in conjunction with Zigbee gate-way, and the gate-way is not included) Features: It can be installed with or without a 0-wire. There are options for one-way, two-way, three-way, or four-way, which can be selected according to your needs. Can be used in combination with other types of switches or wall sockets. Timer function, can set the on or off time, and can also set the countdown on/off time. Compatible with Alexa and Assistant, you can easily control the switch through voice commands. You can remotely control the switch through a mobilephone app, such as turning on the light before arriving home. The switch indicator light design has an indicator light on each button to indicate its position. If not needed, the indicator light can be turned off. Specifications: Type: One-way, Two-way, Three-way, Four-way (optional) Main color: white Current: max. 10A Voltage: 90-250VAC, 50/60Hz Item size: 118 * 72 * 33mm / 4.6 * 2.8 * 1.3in Package size: 132 * 82 * 52mm / 5.2 * 3.2 * 2.0in Package weight: 183g / 6.5ounce Packing List: 1 * Switch 1 * Switch