The Smart Bluetooth Finger Ring Electronic Counter is a versatile health monitoring device. It features an IP68-rated dustproof and waterproof design, ensuring durability for sports and daily use. With 8 adjustable sizes (US 7-13), it provides a comfortable and stable fit for different finger circumferences. The built-in 40mAh battery offers long-lasting performance, while full compatibility with iOS and Android systems allows seamless real-time data synchronization with mobile phones.