Good seller and fast shipping, but the module is not very useful. After hours of trials, I managed to communicate to the module. But the firmware on the module is buggy (e.g. you cannot change the password) and it cannot be used as serial TX/RX module as the module does not work with standard serial communication, such as Arduino. It only worked with a special chinese App. All in all, a waste of money... I will now try a HM-11 module.
recieved in 40 days