Extra add-on switch MUST work with Tessan 3 way smart dimmer switch kit(B07R4ZCD2C), cannot works independently
Advantage: all add-on switches are dimmable. and no additional wifi setting is required
Installation Notice: two travelers in and out. please contact us if you not sure install it
Extra added switch MUST work with Tessan 3 way smart wifi dimmer switch kit, can not work alone
Guarantee and Service Support: 18 month wrranty and lifetime support provided directly from tessan, 30 days refund guarantee and 24h/7 fulltime customer service.