A giant knob you can stick on the back of your phone is taking off with celebrities and it’s on track to sell million this year. Buy Mobile Smart Phone Finger Ring Grip Holder Stand Automotive Racing Speed Shift Knob Stands Amazon.com FREE DELIVERY possible on eligible purchases.With Bluetooth already enabled on your smartphone, Bluetooth locks seem like an obvious choice to monitor and control your lock from. The downsides compared to other connectivity options is sometimes a reduced range and the fact that you can’t control them past Bluetooth range without an additional Wi Fi add on that connects to a Wireless network..Keys are so th century. A connected lock offers both security and flexibility, letting you control access to your home with your phone. And installation is easier than you think. Here’s what you need to know and the best smart locks we’ve tested..Amazon.com knob for phone finger. Ant Saver Rotary Cell Phone Holder Finger Loop Grip Mount Universal Smartphone Kickstand for iPhone s Plus, iPhone Plus, Samsung Galaxy S S,LG Black Gold. . out of . $. $ . . coupon applied. Save with coupon.. Pressing in on the digital knob will bring up more details for some of these main widgets on the watch. After using your connected smartphone to customize your workout interface, press in on the digital knob to choose the activity you want to track with the Vertix..Our top pick is the Mishimoto MMSK BK Weighted Shift Knob. It has a universal design that allows it to fit any make or model of car. The knob has an aluminum exterior that provides a smooth grip and the knob is available in black or silver. Both colors carry the Mishimoto signature M on the top face..Your smart home starts at the front door. Control and monitor your home from anywhere with August Smart Locks and Doorbell Cam!.