This band is from my favorite company Xiaomi , this band is waterproof ip67 , this is hrx edition , it has Bluetooth , you can connect it to any phone I am using it from 5 months its very good no problems till now you can change the strap also straps are available on Flipkart, Amazon and MI store it has notification option , if you charge it full 100% you can use it for more 20 days