?<strong>Features:</strong><br />Being a bike speed and cadence sensor， it will detect and send your real-time RPM， speed， distance and other information to you accurately.<br />Based on high quality material， the sensors and magnets can be attached to your skin closely.<br />This Bluetooth 4.0 technology supported device is very fashion and creative.<br />The most popular bicycle sensor in the world easy to use yet is very durable.<br />Ultra low power consumption， the replaceable battery's life will last up to 1 year.<br /><br /><strong>Specifications:</strong><br />Color: Black<br />Battery: CR2032<br />Material: Plastic+silica gel<br />Technology: Bluetooth 4.0(low power dissipation)<br />Transmission: Wireless Bluetooth<br />Package size: 12 * 4.2 * 11cm / 4.8 * 1.6 * 4.3in<br />Package weight: 87g / 3.06oz<br /><br /><strong>Package List:</strong><br />1 * Speed Transmitter Wired with RPM Sensor<br />1 * RPM Sensor Mat<br />1 * RPM Sensor Magnet<br />1 * Speed Sensor Mat<br />1 * Speed Sensor Magnet<br />1 * Speed Sensor Fastening Accessory<br />8 * Fastening Lines<br />1 * User Manual(English)<br /><br /><strong>Note:</strong><br />Supported devices: iPhone 4S， iPhone 5， iPhone 5S， iPhone5C， iPod Touch 5， the NEW iPad， iPad 4， iPad mini， iPad air.<br />Supported apps: Wahoo Fitness， Strava， MapMyRide， etc.<br />Battery: Open and close it with a coin.