Features: 1. Ring Prayer Reminder, Tasbih Counter, Display Time Kaaba Guidance 2. When The Button Count Reaches 33, 66, 99, 100, The Ring Will Have A Vibration Reminder. 3. The Appearance Is Exquisite And Beautiful And It Can Be Counted At Any Time And Anywhere 4. Rotate As You Wish 5. Connect To App, Time Will Synchronize Description: BT: BT 5.1 App Control Supporting OS: for Android 5.1 or IOS 10.0 Or Later Screen: Oled, 0.49inch, 64x32mm Ring Battery: 35-40mAh Button: 1 Button Charging Port: DC-5V Standby Time: 30day Note: Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The Use size: Ring Inner diameter size is about 22mm Material: plastic colour: Green Package Contents: 1 x Smart Bluetooth Ring Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.