Features: With built-in BLE5.1 version, it can quickly connect to the app, get accurate direction and synchronsie data with your smartphone and watch. 0.49-inch OLED display showing the for time, allows you to see clearly of the numbers of chants and prayer times. An integrated CNC button, you can easily keep track if your daily Tasbeeh count at all times, click the button to count, it will vibrate when the count reach to 33, 66, 99 or 100. Equipped with a 40mAh high capacity battery, long battery life up to 3 days of normal use. Convenient to use, it can be charged anywhere, any for time via a USB cable to an power adapter or computer. Lightweight and available in 5 colors, making it comfortable to wear, stylish and youthful, a great gift for your Musilim friends. Specifications: Model: Zikr 1 Lite BLE Version: BT 5.1 System: Android 5.1 or iOS 10.0 or later Screen: OLED, 0.49", 72x40 Battery Capacity : 40mAh Button: 1 Button Charging Port: Pogo Pin Theoretical Working Hours: up to 3 days in typical usage or up to 5 days in basic usage Sensors: Vibration Motor Material: Resin Size: Approx. 18 mm or 0.71 inch Color: Black, Brown, Green, White, Pink(optional) Note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1 Piece 18mm for Smart Counter Ring