Using Notice: 1. DON’T wear the band when you are swimming or diving. 2. Install APP ‘Mi Fit’ only via link: http:m.app.mi.com/detail/68548 3. Heart rate monitor is valid in the condition of keep still of your arm and body. 4. Keep other bands (such as Miband 1S and 1A) away from Miband 2 when you tring to pair with a phone, otherwise it may cause unsucessful paring. Touchpad OLED Screen !!! Specifications: Battery Capacity: 70mAh Standby time: days Batteries Type: Lithium Polymer Input current: 45 mA (TYP) 65 mA (MAX) Weight: 7.0 g The main material: plastic, aluminum Waterproof rating: IP67 Strap: total length: 235 mm Adjustable Length: 155-210 mm Material: thermoplastic elastomers, aluminum 0.42 inches OLED display Bluetooth 4.0 BLE Low power consumption acceleration sensor and photoelectric heart rate sensor Compatible Minimum Requirements: 1.Requires Bluetooth 4.0. 2.Compatible with Mi 3, Redmi Note 4G, or any device with Android 4.4 and above. 3.Compatible with iPhone models 4s and above that run on iOS 7.0 and above. For IOS devices : For iPhone 4s / 5 / 5c / 5s / 6 / 6 Plus / 6s 6s plus For smart unlock features: 1.Xiaomi (MIUI 6 and above): Mi2/2S/2A, Mi3, Mi4, Mi Note, Mi4C, Redmi 1S, Redmi 2/2A, Redmi Note, Redmi Note2 Note3, xiaomi MI5 4S XIAOMI MAX 2.Note: Mi Band’s phone unlocking feature requires smartphones with MIUI or Android 5.0 and above. Feature: 1. 100% original Xiaomi mi band 2 2 .0.42inch OLED display screen with touchpad 3. Support Heart rate monitor 4. Passometer,Fitness Tracker,Sleep Tracker,Message Reminder,Call Reminder 5. Sleep-cycle smart alarm 6. Running MIUI Android 4.4 and above versions; For iphone 4s/5/5s/6/plus ios 7.0 and above 7.Unlock your Mi phone without a password 8. Stylish band options Shipment: 1)Most parcels will be shipped via AliExpress Standard Shipping and China Post. Express shipping is cheaper for big orders, enter order number and Aliexpress will choose cheapest shipping method for you. 2)We can not make sure the shipping time,as there are many factors out of our control in the transportation, hope you could kindly understand. Normally it will take around 15-60 days by Air mail, 5- days by express shipping. 3)All items are dispatched within 5 days after payment process is completed, and almost items canbe send out with 48 hours. 4)Buyer will be responsible for any taxes, customs and any other charges generated in the buyer’s country! Note: Please do not open disput easily due to the shipment, any problem, please contact with us, we will do our best to solve it. Guarantee: 1)We will make sure the products are fully protected in delivery when packaging,and we will do our best to prevent damage in transportation. Feedback: 1)Your satisfaction and positive feedback will be our best return for serving you. If you feel satisfied with our products and services, please leave us your positive feedback. Your feedback will be highly appreciated and will help us to serve you better. 2)If you are not happy with our products and services, please contact us before you submit a negative feedback. Once there is a problem reported, all of our staffs will try best to help you out of the issue occurred. Thank you for your understanding. 3) Please do not open dispute or leave negative feedback without talking to us , we will reply to all our customers and solve the problem you have met.