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Feature: 1. Vibration Alert: The smart ring features built in numerical control key. Tap to count, and the device vibrates when the count reaches 33, 66, 99, or 100. You can easily track your daily counts anytime, anywhere. Specification: Item Type: Digital Tasbih Ring Material: ABS Bluetooth: 5.0 Compatible System: Support for 5.1 or Support for iOS 10.0 and above Battery: Built in 45mAh Li Ion Battery Charging Interface: Magnetic Charging Water Proof: IP67 Usage Time: 3-5 Days Screen: Organic LED, 0.42 Inches, 72x40 Wearing Size: Approx. 22mm / 0.87in, 20mm / 0.79in, 18mm / 0.71in Package List: 1 x Counter |