Posma BCB20 Bike Speed/Cadence Combo Sensor for iPhone， Android &amp; ANT Plus Devices Compatible with Bluetooth 4.0 &amp; ANT Plus<div style="text-align: left;"><strong>[Product Information]</strong><ul><li id="replacementPartsFitmentBullet" class="aok-hidden" data-doesntfitmessage="We're not sure this item fits your " data-fitsmessage="This fits your "><span class="a-list-item"><span id="replacementPartsFitmentBulletInner"><a href="#" class="a-link-normal hsx-rpp-fitment-focus">Enter your model number</a>to make sure this fits.</span></span></li><li><span class="a-list-item"> Dual band technology of both ANT + and Bluetooth 4.0， you only need one Speed/Cadence sensor for connecting to all of your training devices， from iOS or Android Smartphone to ANT+ GPS watch to GPS cycling computer. </span></li><li><span class="a-list-item"> Tracks your pedaling rate， biking speed and distance at the same time. It helps you adjust the strength and speed of pedaling immediately， enhance your training efficiency. </span></li><li><span class="a-list-item"> Work will all popular apps including MapMyRide， Strava， RideWithGPS， Cyclemeter， and more. </span></li><li><span class="a-list-item"> Supports iPhone 4S or later， Android device with Android 4.4 or later， or device with ANT+ or Bluetooth 4.0 low power wireless connectivity. </span></li><li><span class="a-list-item"> Lightweight and attach easily to any bicycles and frame sizes. Waterproof and long battery life. </span></li></ul></div><img src="http://ecx.images-amazon.com/images/I/41fBTkQIV%2BL.jpg" noproxy>