The period after the command to receive a device sent directly from China, without information. The device received not function with any audio device: Bluetooth connection is no problem but no sound is produced on the devices from an iPhone or iPad. The device was tested with Bose devices, B & W and others, never run. In my opinion, this is the device that malfunctions. No going back. Despite mails messages, no return of the sender to possibly change it.
