A Neutral Wire Is Required For Installation. Smart Dimmer Switch By Martin Jerry Product Features Dimmer Switch: This is a smart dimmer switch for LED lights. It supports dimmable LED/CFL bulbs (Max 150W) and INC bulbs (Max 400W). Smart Home: This smart switch dimmer is compatible with Alexa and works with Google Assistant for voice control. You can remotely control it on smart phones, and set home automation according to schedules, sunset, sunrise, and etc. Installation: This smart light switch dimmer is easy for installation like a toggle switch. But a neutral wire is required. It is for Single-Pole use (Not 3 way). No hub is required for this Wi-Fi dimmer switch, but 2.4G Wi-Fi ONLY (Not 5G) Advantage: ETL Listed, Over Temperature Protection for Safety, Brightness Memory when turning off, Soft On Soft Off Visual Effect Service: Martin Jerry has a professional support team to solve your problems promptly. Email will be replied within 12hs. We offer 90-Day 100% refund, 1-year Quality Warranty 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!