Joyzy Fitness Tracker, Activity Tracker, Fit Watch, Fitness Watch, Step Counter, Pedometer, Waterproof, Touch Screen (Black + 2bands) Pistas pasos, distancia, caloras quemadas, y monitores cunto tiempo y as usted duerme. con un toque suave en la visualizacin, datos grabados se mostrar en secuencia. This tracker requires Android phone with 4.3+ system or iPhone with IOS7.0+ system (sometimes iPhone4/4S not work, but iPhone 5/6 works well). Make sure you downloaded correct APP (WristbandAPP Fitness Pro for IPhone and Wristband APP for Android). It may not connect if battery is low power. (4) If still not work, please turn off your phone bluetooth, close APP, turn on your phone bluetooth, open APP and try to connect again.The tracker need to be connected with phone before it start to work. it record steps by counting the "swing of arms" because most customer wear it on arms, but sometimes customer swing their arms when they are not walking. it will be more accurate if customer wear on ankle. we offer ankle bands for free. Te recuerda de reloj de alarma de vibracin y fitness progreso sin despertar a los dems o molestar gente cerca de usted IP67 waterproof means there is no need to take the tracker off during swimming (up to 30 minutes) or showering. It is also totally protected against dust. firstly, need to download APP to phone, connect via APP. secondly, it request iPhone with IOS7.0+ system. IP67 impermeable significa que no hay necesidad de quitar el tracker durante la natacin (hasta 30 minutos) o ducha. es totalmente protegidos contra el polvo. there are 2 charging pin on tracker and charger, please make sure they get contacted with each other. Urgent notice: We released updated APP "smart wristbandapp fitness" in Google play and apple store, some user manual may tell you to download old APP which may has compatibility issue, sorry for the trouble. Please download this updated APP after you receive the tracker. It's compatible with iPhone/iPad (which was released later than iPhone 5) with IOS7.0+ system and Android phone/tablet with 4.3+ system. Will not connect to bluetooth and if not connected it only tells me the time, pointless.----of course it connect via bluetooth. the same issue as previous issue. firstly, need to download APP to phone, connect via APP. secondly, it request iPhone with IOS7.0+ system. Vibration reminds you of alarm clock and fitness progress without waking up others or disturbing people near you. The tracker works for one week with every full charge. The wrist strap fits up to an 8 inch wrist and is easy to secure 'Es compatible con iPhone/iPad (que fue lanzado ms tarde de iPhone 5) con sistema IOS7.0 + y sistema Android phone/tablet con 4.3 + . need to connect before sync. then, the same issue as previous issue. firstly, need to download APP to phone, connect via APP. secondly, it request iPhone with IOS7.0+ system. El Tracker funciona para una semana con cada carga completa. la correa de mueca se ajusta hasta un 8inch mueca y es fcil de asegurar. una persona con un mayor mueca puede ser necesario para el tobillo bandas que tambin se pueden utilizar en una mueca