MEILAN M4 wireless bike computer software OTA updata use guide
M4 Software upload steps Download APP: nRF Toolbox from Anroid/IOS APP sotre; After install，Open this APP,find DFU button，select upload file: (OTA-M4.zip) Open bluetooth switch:on in your smartphone; Select our bike computer (Bluetooth name is : M4 DFU) Click: upload button，uploading start, wait the progress bar becoming 100% is OK; Download file to uptade: https://www.4shared.com/zip/6Gybg8wsee/OTA-M4.html