This product has now been replaced by a newer version that supports bluetooth. Bluetooth is great if you want to use this with your phone or other BT device. But Ant+ is still a great standard and has advantages over Bluetooth. Bluetooth will generally give you a better connection. Ant+ more prone to dropping signal but it does use less power so you'll be changing batteries less often. Ant+ also allows connection to multiple devices while Bluetooth is a 1:1.