The HALO Home In-Wall Accessory Dimmer is the perfect complement to your HALO Home light fixtures (only for use with HALO Home Bluetooth® light fixtures). Once installed, use accessory dimmer for ON/OFF and dimming functions of your existing HALO Home light fixtures. After you pair with the free HALO Home mobile app, the dimmer gives you one-click access to HALO Home app functions, which include ON/OFF, grouping, scheduling, scene-setting, and dimming. This dimmer can serve as a standalone switch, or multiple switches can be combined to create multi-switch (3-way switch) functionality. All dimmers must be HALO Home In-Wall Dimmers. No internet or hub needed. As an added bonus, even when the physical switch is in the OFF position, you can still control your light through the HALO Home app.