The official Onvis Amazon storefront is now offering its Thread-enabled HomeKit Door Contact Sensor for $20.99 shipped when clipping the on-page coupon. As only the third discount from its usual $30 going rate, this is delivering a new all-time low at 30% off. The previous two discounts both landed at 15% off, with today’s offer delivering an extra 15% in savings. Having just hit the scene, these new Onvis contact sensors arrive to deliver Thread and HomeKit control for automating your space in the new year. Ideal for adding some extra security into the mix or setting routines to run based on when a door opens or closes, the sensors will let you take your smart home to the next level. We’ve previously gone hands-on with Onvis gear and walked away impressed, too. Head below to see how these Onvis offerings compare to other contact sensors on the market.