Three-Way Smart Wifi Dimmer Light Switch (Wf31S), In-Wall, No Hub Needed, Works Product Details 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. 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.