The RadioRA 3 Sunnata RF Companion Dimmer Switch allows you to expand the use of your RA 3 Sunnata RF PRO Dimmer Switch (RRST-PRO-xx only) and its advanced LED+ dimming technology to create multi-location dimming applications.  Up to four Sunnata RF Companion Dimmer Switches can be used with one RRST-PRO-xx - creating five points of dimming control. Tap the switch once for your preset light level, set by your Sunnata RF dimmer switch, and twice for full brightness. Swipe the touch light bar to dim/brighten your lights. The smooth fade-on and fade-off allows eyes to adjust comfortably to a determined light level; push and hold for 30 seconds delayed fade-to-off. Coordinating wall plates sold separately.
Lutron RadioRA 3 Sunnata RF Companion Touch Dimmer Switch
The RadioRA 3 Sunnata RF Companion Dimmer Switch allows you to expand the use of your RA 3 Sunnata RF PRO Dimmer Switch (RRST-PRO-xx only) and its advanced LED+ dimming technology to create multi-location dimming applications.  Up to four Sunnata RF Companion Dimmer Switches can be used with one RRST-PRO-xx - creating five points of dimming control. Tap the switch once for your preset light level, set by your Sunnata RF dimmer switch, and twice for full brightness. Swipe the touch light bar to dim/brighten your lights. The smooth fade-on and fade-off allows eyes to adjust comfortably to a determined light level; push and hold for 30 seconds delayed fade-to-off. Coordinating wall plates sold separately.
Companion Switch has screw terminals, and does not require a neutral; RA 3 Sunnata RF Neutral Switch (RRST-8ANS) does require a neutral wire
RA 3 Sunnata RF Companion Switches do not count toward Radio RA 3 device counts, allowing functionality without compromise 
Use up to four Sunnata RF Companion Switches with one primary switch (RRST-8ANS-xx sold separately) to control one light from up to five locations
MyLevel Personalization- Program lightbar brightness and off-state locator light; Companion switches will match the settings of the primary switch (RRST-8ANS-xx sold separately)
Tap the top of the switch for On, tap the bottom of the switch for Off; Push and hold the bottom for a 30 second delayed off
Sunnata RF Companion Switches will only function with the RA 3 Sunnata RF Neutral Switch (RRST-8ANS-xx, sold separately)
RadioRa 3 Processor combines the functionality of the main repeater and Connect Bridge of RadioRA 2 (sold separately)
Works without Wifi; Local device operation will continue to function if internet connection is lost