... time Solar 2-way GSM Audio Device,Audio Device,GSM audio listening device,GSM SIM audio device,This product is using the German ... need external software or configuration, just insert a valid SIM card into the SIM card slot, placing it at a inconspicuous location, ... Flashlight:Regardless of the boot or shut down in the state, touch the “X” labels.Boot:Open the back cover, insert the SIM card holder ...