This is a DIY and portable intelligent smart switch, it can be used for different types of switch boxes. It can automate your home appliances with eWeLink app via your smartphone, tablet or voice control. Features: Working with an external switch, it has one wire can be used to connect the toggle switch, it can be installed inside the switch to turn on/off your devices connected with the switch. Can connect a pair of two-way switches to turn on/off turn off downstairs light. Lightweight and portable, it takes up very little space when installed in various types of switch boxes, even the EU standard switch box. You can control the devices in your home via eWeLink anywhere and anytime. Turn devices on/off completely hands-free by connecting to Amazon-Alexa or Google-Assistant . Set time turn on/off automatically. Support share the device with your family or friends, they can control it directly on their phone. If you are not at home, you can also know your device is on or off via the eWeLink app. Features: Item Type: Switch Material: PC V0 Quantity: 1PC, 2PCS, 4PCS, 8PCS, 10PCS (optional) Input: AC100-240V 50.60Hz 10A Max Output: 100-240 V AC 50/60 Hz 10 A max. Wi-Fi: iEEE 802.11b / g / n 2.4 gigahertz Package weight: 1PC: 50g / 1.76 ounces 2pcs: 100g / 3.52 ounces 4 PCS: 200g / 7.05ounces 8pcs: 400g / 14.1 ounces 10pcs: 500g / 1.1pounds Package size: 1PC: 60*50*25mm/2.36*1.96*0.98inch2PCS: 100 * 60 * 25mm / 3.93 * 2.36 * 0.98 inch 4 PCS: 200 * 60 * 25mm / 7.87 * 2.36 * 0.98 inch 8 PCS: 400 * 60 * 25mm / 15.7 * 2.36 * 0.98inches 10 PCS: 500 * 60 * 25mm / 19.6 * 2.36 * 0.98 inch Note: 1. It does not contain a lot of electricity, do not break the jacket. 2.To ensure that the RF signal is stable, please keep the wire away from the metal component in the switch box when wiring. Package List: 10PCS * Switch