Phone picked up for high-quality monaural microphone for digital recording device support. Simple operation put the handset to put on the ear microphone connected to the recording device. It picked up to clear your voice and the voice of the other party using high sensitivity microphone. Direct connection to the microphone input terminal in the plug-in power system 1 the battery is not needed. Earpiece comes with size 4 the size of the perfect choice for you. It is available 2 to PC with 3-prong plug adoption .<br>