Step Counter: Record the number of daily movement steps to view the current real time steps. The distance of motion is estimated based on the number of walking steps. Estimate the calories burned based on the number of walking steps; Multi-sport mode: Under this interface, you can record the calories and duration of running. Skipping rope mode, sit-up mode, Sleep mode, Information mode etc. Sensor Type: 6-axis sensor. Connect via App-This fitness band will only work after installing fitness band application from play store. TO set time, call, message notifidation etc you have to install fitness band application from Play Store. Please refer to user manual comes in the box for which application to download. This product uses professional Bluetooth RF signal and custom algorithm.Pull out the strap and there is a USB plug in one side of the watch. Insert the plug into any normal USB adaptor and it will charge.