B042 4-in 2-out Power Amplifier Sound Switcher Loudspeaker Switch Distributor, 300W Per Channel Lossless Sound Quality, B042 T&G Provide waterproof waterproof casing

Provide waterproof waterproof casing

walkie-talkie and so on

Protect your expensive lens from dust and scratches without degrading photo quality

Sensor: Proximity Sensor

Support heart rate/blood oxygen monitoring

B042 4-in 2-out Power Amplifier Sound Switcher Loudspeaker Switch Distributor, 300W Per Channel Lossless Sound Quality, B042 T&G Provide waterproof waterproof casingProduct Presentation Do you have 4 power amplifiers and 2 sets of speakers that need to be connected to each other? Do you need four amplifiers and two sets of speakers to get stuck? A powerful amplifier and audio switcher can solve these problems, 1. 4 power amplifiers push button select switch input,2 sets of stereo speakers push button select switch output (2 sets of speakers can be opened or closed independently) 2. sets of stereo speakers can