3 Way Smart Dimmer Switch By Martin Jerry | Touch Trailing Edge 4 Way Smart Product Details 3-Way 4-Way WiFi Switch Dimmer: Works with traditional 3-way and 4-way switches. Two WiFi dimmer cannot work in the same circuit. In both 3-way / 4-way circuit, just replace the live side 3-way standard switch by this wifi swtich. Lights should be Dimmable LED Bulb (150W) LED Dimmer switch: This smart switch implements the Trailing Edge dimmer solution. It is better than other dimmer switches for LED lights. It will bring you a new dimmer experience with larger dimming range, smoother dimming process, and less flickering Dim Schedule: dim your lights in a period. Say from 6am to 8am, change the brightness from 1% to 80%. This can be one time or repeat schedule Installation Notice: In both 3-way or 4-way ciruit, replace the live side traditional 3-way dimmer switch by this one. And keep the other switches as usual.Follow the user manual on website. Neutral Line is required, support 3-way and 4-way Circuit , 2.4G Wi-Fi ONLY (Not 5G). Please contact us for any tech problems Other features include: TASMOTA supported(user manual on our official website), Changeable night light, Adjustable minimum brightness, separate WiFi button Warranty: Martin Jerry Promises 90-Day 100% refund, 1-year Quality Warranty for it?s Smart Home Devices on Amazon Payment We accept PayPal and credit cards via PayPal. Taxes - US We collect sales tax, as required by law. Shipping We make every effort of shipping within 3 business day of payment clearing. The estimated delivery time is 2 - 5 business days from the shipping date. Policies If you do need to return your item, please contact us via email (you will receive an email when your product ships with additional details - Subject: Important information about your purchase). You will then be provided with a return shipping label and packing slip. Pack the item carefully. Include the packing slip, apply the shipping label, and return the item within 30 business days of the date you request a return, or your return will be canceled. Once we receive your order we will inspect the return. Please allow up to 5 business days of receiving the returned item for your refund.