3-Way Smart Wifi Dimmer Light Switch, In-Wall, No Hub Needed, Alexa And Google Product Features IMPORTANT: Must have Neutral Wire for this to work, please check your wiring prior to purchasing. Affordable 3-Way Solution: No special companion switch needed. Work with regular 3-way on/off switch for 2 locations control, does not work with a smart switch or a dimmer switch. Remote operation: Control the device remotely with your smartphone when connected to 2.4G wifi network, for scheduling, dimming and ON/OFF operation from anywhere. Voice Control: Works with Amazon Alexa/ Google Assistant (sold separately) to enable voice control. High Quality: Built with sturdy aluminum plate and fireproof plastic, rust-proof, heat faster, more sturdy. Latest Upgrade: The smart switch shell depth is reduced by 20% size compared to previous models, to fitting in more switch boxes. The latest user manual has been updated on the product detail page. Only support single-pole and 3-way circuit, not support 4-way circuit, Not suitable for fans. Only support 2.4 G Wifi. 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!