PETKIT Pet Activity Monitor for Dogs and Cats - Activity Monitoring - Sleep Tracking - Calorie Expenditure - Mood Detection - Health Analysis Functions: Activity Monitoring. Sleep Tracking. Calorie Expenditure. Mood Detection. Health Analysis. Peace of Mind - Receive automatic updates about your dog's day directly on your phone, whether you are together or apart. Pet Community - make users getting to know each other, share pet happiness and have deep communications. Texas Instruments high performance SOC processor. Kionix 3D activity monitor of high sensitivity and low power consumption. IP67 water resistant. Bluetooth 4.0 BLE smart low energy. LED indicator light. Over-the-air (OTA) firmware update supported. 3/8" (8.9mm) thickness x 1 1/4" (31mm) diameter. 0.28 oz (8 g) weight. CR2032 Lithium 3V Coin Cell Battery (Included). Simple Set Up - Search and download PETKIT from App Store (on Apple devices) or Google Play (on Android devices). Compatible with smartphones equipped with Bluetooth 4.0 and running iOS 7.0 or later, and Android 4.3 or later. Online customer service - A "CHAT" button on APP where you can ask for help whenever you meet any technical problems.