Bluetooth heartrate belt， a great tool to provide immediate， continuous and convenient heart rate value during all form of exercises， can be used as your exercise aid， motivational tool， trendy accessory， data analyser and personal trainer， aiding you on your journey towards your health and fitness target. It's compatible with most smartphone， supporting iPhone 4S， Android 4.3 or above.<br><br><strong>Features:</strong><br>Bluetooth heartrate belt， monitor your heart rate.<br>Bluetooth 4.0， wireless chest strap.<br>Ultra-soft elastic strap， comfortable fit.<br>Adjustable size， fits most people.<br>Snap attachment method， easy to use.<br>Support iPhone 4S， Android 4.3 or above.<br><br><strong>Specifications:</strong><br>Type: Wireless Heartrate Belt<br>Material: ABS?<br>Water Resistance: 30M Water-resistant<br>Bluetooth Version: Bluetooth 4.0<br>Support Device: iPhone 4S or above， Android 4.3 or above<br>Battery: CR2032 Battery (Included)<br>Battery Voltage: 3V<br>Chest Length: Approx. 98cm / 38.6in?<br>Chest Width: Approx. 3cm / 1.2in<br>Item Weight: Approx. 57g / 2oz<br>Package Size: Approx. 16.5 * 10 * 3.3cm / 6.5 * 3.9 * 1.3in?<br>Package Weight: Approx. 159g / 5.6oz<br><br><strong>Package List:</strong><br>1 * Heartrate Belt (Battery Included)