Overview Operating System : Momax Rings App Special Feature : Lightweight Wireless Communication Standard : Bluetooth GPS : No GPS Shape : Round Brand : MOMAX Style : Rose Gold Compatible Devices : Smartphone Display Type : No Display Compatible Phone Models : Compatible with iOS devices About this item Momax Ring SIZING KIT (Smart Ring Not included)!!! - The Momax Ring Sizing Kit is the ideal way to find the perfect size. It’s a custom sizer that allows you, and those around you, to find the perfect fit before purchasing. SIZE BEFORE YOU BUY - Momax Ring sizes are different from standard ring sizes. Size yourself with the Momax Ring Sizing Kit. For additional details, see the “From the brand” section below. NOT STANDARD SIZING - Momax Ring sizes are slightly different from standard ring sizes, so it is important to size yourself using our Momax Ring Sizing Kit. Momax Ring is available in sizes 7-13. There are no half sizes. COMFORT AND ACCURACY - A properly fitting Momax Ring will result in the highest data accuracy, comfort, and overall experience. CHOOSE A FINGER - Momax Ring works on all fingers and can be worn on either hand. For optimal accuracy, we recommend wearing your Momax Ring on your index, middle, or ring finger. Size the exact finger you plan to wear your Momax Ring on.