D6423/6424 Volume ControlAugust 28, 20194-channel unbalanced stereo/2-channel balanced stereo volume controller. Users could use with central control devices to control volume.view
POE1028 SNR Self-adaptive PoE Network SensorJuly 28, 2020The device will automatically adjust the volume of the broadcast sound to make it larger than the on-site ambient sound; otherwise, when the on-site ambient sound is detected too much smaller than the...view