audio equipment

Just bring a device capable of playing pre-installed audio or smartphone applications, visitors can listen to information about artifacts without a guide at the museum.

Over the past few days, information about the kind of woolen woolen caps that are sold in Nam Dinh has a strange device, sounds, and tinnitus, which leads to public concern.

The US Department of Defense will install a type of audio device capable of detecting the flight path of bullets flying from the ground into the transport helicopter.