1)This switch can be work at both of without Neutral wire and with neutral wire,perfectly compatible with these two wiring methods.If your House wiring is without neutral Wire, A capacitance is a must to be connected to both ends of the L1 bulbs for normal work.

Specification:

Type: 1/2/3 cast iron touch WiFi switch
Material: PC V0 fireproof + tempered glass panel.
Rated Voltage: AC90V-260V, 50/60Hz.
Load Power:3-300W/gang(Note:If it is used for LED or energy saving bulb,the power load should be less than 100W)
RF Frequency: 433MHz.
Wi-Fi: 2.4GHz, IEEE 802.11 b/g/n
Support by : Android and iOS
App: tuya/Smart Life
Wiring mode: neutral Wire and no Neutral Wire design, any family can use (with or without neutral wire can be used).

Features:

【Remote Control】 The user can use a smartphone to remotely control the home electronics remotely anytime, anywhere as long as the phone has 2G / 3G / WIFI network compatible with iOS and Android operating system with Smart Life and Tuya app

【Voice Control】Compatible with Amazon Alexa (Echo / Dot / Dot / Tap), Google Assistant, IFTTT. Flight ticket counter with Amazon Alexa or Google Home to turn your switch on or off with your voice, No hub required

【TIMING】The intelligent timer switch will automatically turn on after setting a timer for this switch, which is essential for daily scheduling, and bring you a comfortable and intelligent lifestyle

Tips–App

Be sure that you are using 2.4GHz WiFi when connecting with the smart bulb. And WiFi must be detectable status. Many routers have 5 GHz and 2.4 GHz network and your phone will always automatically connect to the 5 GHz network. So, you have to completely turn off your 5 GHz network by going to your router settings (enter the router IP address into your internet browser, usually something like 192.168.1.1), forcing your phone to connect to the 2.4 GHz network.

In addition, the router encryption mode must be WPA2-PSK type and the authentication type must be AES