Martin Jerry'S 3 Way Smart Dimmer Switch | Touch Trailing Edge 4, Compatible. Product Features 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 Shipping: Shipping is complimentary within the lower 48 US States. We Do Not Ship to PO/APO Boxes, HI or Alaska We Do Not Ship Outside of the Continental US All items ship within 24-72 hours of Payment For large items that require Freight shipping a valid phone number is required to call and schedule your delivery Terms of Sale and Feedback: Feedback is extremely important to us and If you are satisfied with our transaction, please take a moment to leave Positive Feedback. YOUR Satisfaction is our #1 Priority! If there are any issues, PLEASE contact us BEFORE leaving a neutral or negative rating so that we may resolve any concerns. We PROMISE we can make you happy if you give us a fair chance. Returns / Concerns: All items qualify for returns within 14 - 30 days of receipt. Buyer is responsible for return shipping on any item that is not damaged Please be sure this is an item you want before making your purchase. Customer Satisfaction is our TOP priority! All items are IN STOCK at time of listing. Inventory changes constantly and it is impossible to maintain a perfectly accurate count of all items. Please do not penalize us if we have to issue you a refund! Thank You For Your Business!