... Solar 2-way GSM Audio Device,Audio Device,GSM audio listening device,GSM SIM audio device,This product is using the ... cell phone back when there is sound around the device. it is the ideal SIM surveillance equipment you ... you want to check it’s surrounding, the device will not automatically back out.can only answer call ... .Package include :1 x Two-Way Audio Device 1 x USB Cable 1 x Power Charger 1 ...