He said he left an answer-phone message saying he had discovered his wife was having an affair and had run over her boyfriend, so he would probably not be available for the rest of the trials because he was "going down for murder".
With Bluetooth capability, you can use a discreet remote control to change volume, turn the device on and off, toggle between electronic devices, answer hands-free phone calls and stream music, sort of like having a miniature wireless headset in your ear.