We use a cable plus your device's connection because it's more reliable than Bluetooth over distance — if you miss that notification, your dinner is burnt. We don't think you should have to be tethered to your kitchen! With Range, if you have more than one device then you can walk away worry-free, and get push notifications from anywhere you have Internet (not just the finicky 30-50' range of Bluetooth). We think that's cool.
Our cable is silicone that's heat-resistant up to 450ºF and long enough to reach the iPad that's on your counter doing recipe duty. Other benefits: No batteries to worry about, compatible with more iOS devices (pull your old iPod touch out of the drawer) — and significantly more affordable.