Treatlife 3 Way Smart Dimmer Switch 2 Pack, 2 Master Dimmer, No Hub Required. Product Features [Easy Install Safe-support]: Step-by-step instructions will guide you through the wiring process in a short time. Note: The switch must be installed on the power source side, and the other end can only be connected to a standard/dumb 3-way. Neutral wire is required, standard wall plate size. Treatlife 3 way dimmer switch works with 2. 4G WiFi only( NOT 5G). The smart switch is for dimmable bulbs. FCC certified. Flame-retardant material and built-in overheat protection for safety. [2 Master 3-Way Smart Dimmer Switches]: Comes with two main switches that could be used independently, you can install one to replace a current three way setup in a hallway and use the other one in a bedroom. Can be used as a 3-way or single-pole switch. Just replace one traditional 3-way switch to control the light from 2 locations, best for top and bottom of a staircase, garage and other large spaces. [1%-100% Dimming Voice Control]: This smart dimmer switch can adjust brightness level from 1%-100% with Alexa and Google Assistant voice assistants, it can easily control dimmable light by sending voice commands like?Alexa, dim the living room light to 30%.? Brightness memory function is available for the wifi light switch to remember the last light setting when powered off. [Remote Control Schedule]: This dimmer switch controls the light from anywhere and anytime by the Smart Life/Treatlife APP. You can set up schedules for the light to turn on/off according to your daily routines. Support setting countdown, sunrise and sunset timer. The smart light switch will automatically turn the light on with the preset brightness or off at specific times. It looks like someone is at home when you leave. [Share Control Worry-free Support]: Device sharing feature of the alexa light switch allows you to share the control with your family. Let you and your family enjoy the proper atmosphere on different occasions by adjusting the brightness at any time. If you have any questions about your dimmer light switch, please feel free to contact us, we will give you online installation assistance. 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!