Unknown button on dash

This is my 2011 Toyota Tacoma pre runner Trd off road and it has this phone button with an up arrow and down arrow but I have no clue what it’s for and when I press the phone button it makes like a hum sound but doesn’t do anything and I just need help figuring out what it does

 

Do you have your manual? Seems like it should be connected to your mobile in some manner, Bluetoothprobably...

 

Looks like some kind of aftermarket hands free phone device, definitely not factory.

Follow the wires from that button to the control box, there's likely some identification on that that you can throw into a search engine and get info on it.

 

https://www.tacomaworld.com/threads/2011-tacoma-setting-up-cell-phone.430432/

 

I'm more concerned with the mystery laser that's aimed towards the junk.

 

Rostra Universal hands-free Bluetooth system.

 

Yea it’s a universal system some south east Toyota dealer use to install.

 

Weird it doesn't have DAC or RSCA Off buttons

 

I have a similar one I installed. Mine was a Toyota accessory, allowing for Bluetooth connectivity with phone. There should be a microphone somewhere (I installed mine by the rear view mirror). To get it to pair with a phone, press and hold the centre button for 3+ seconds. You should hear some beeps, then connect with phone.