B042 4-in 2-out Power Amplifier Sound Switcher Loudspeaker Switch Distributor, 300W Per Channel Lossless Sound Quality, B042 T&G Support heart rate/blood oxygen monitoring

Support heart rate/blood oxygen monitoring

One meter wire dissolved oxygen electrode x1

Sensor: Proximity Sensor

walkie-talkie and so on

10 meters wireless receiving range

B042 4-in 2-out Power Amplifier Sound Switcher Loudspeaker Switch Distributor, 300W Per Channel Lossless Sound Quality, B042 T&G Support heart rate/blood oxygen monitoringProduct 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