New M2 Smart Bracelet Heart Rate Monitor Bluetooth Smartband Health Fitness Tracker Smart Band Wristband for Android iOSDear customer, when you use it, you need to download the app. In the manual, there is a QR code. You can choose your mobile phone, choose Android or Iphone. After the download is complete, you need to open the Bluetooth link. system configurationBattery capacity:70MAH Standby time:300 hourinput voltage:5Vweight :6.9 grams net weightTexture of material:Plastic ABSwatch strap:TPU elastomer total length: 235mm width: 19mmscreen:0.42 inch OLED heart rate:S7000Bluetooth:Bluetooth 4.0 /compatible ( android and IOS)Touch:Touch mode buttonwaterproof :IP67 Gradesensor:Low power acceleration sensorFunction configurationShort message:SMS Bluetooth sync remindertime :OLED show 24stylepedometer:Motion planning step Sport mileage recordcall reminder:vibration(Call,Short message,We chat, QQ)Sleep monitoring:Monitoring sleep quality Charging interface ;USB socket Standby time:300 hourAlarm clock:cellphone in tercalate ( clock)100% Hot and High QualityWe will carefully test every item before shipment.Notes:Due to manual measurements, please allow an error of 1-3 cm.Due to problems between different monitors, the image may not reflect the actual color, please refer to the actual product.If there is a problem with the product, please contact us.Thank you for understanding.FEEDBACK:1.If you are satisfied with our products and services,please leave your postive feedback and 5 stars.2.If you don't satisfied our products,pls contact us before you leave negative feedback.we guarantee we will 100% slove any problem for you and make you satisfied.SERVICE:1.We care about our valued customers,and will always try to help you,hope to establish long business with you.556.Please contact us by Jumia Customer service before leaving any negative feedback or opening and dispute on the site. Please give us the opportunity to resolve any problem.Thank you.