C61 - Sensor device: High sensitive sensor device. - Drop shock: 1.5m Natural drop. - Weight: About 9.6g (including battery). - Physical dimensions: 37x36x10mm. - Waterproof: IPX7. - Battery: 12 months (1 hour usage per day). - Wireless transmission: Bluetooth 4.O BLE; ANT+ /2.4G. - Compatible devices: iPhone 4s/5/5c/5s/6/6 Plus IiPod touch 5 iPad 3/4/Air / Mini Compatible Samsung Galaxy S4/5/6 / Not 3 devices Google Nexus 4/5/6 Android 4.3 BLE devices Garmin Watch(support ANT+). - Package include: C61 x1. Strap x2, User Manual x1, CR2032 Battery x1.