Sound pickup use the high fidelity and low noise process chip. After multiple times frequency selected it can restrain the noise efficiently. Pure tamber, strong dynamic, built-in AGC circuit. Lots of strong points: low noise, high fidelity, wide operating voltage, low power dissipation and long transmission distance etc. the new sound pickup (audio monitor ) is the best choose for the TV monitoring and safety system. Match use with the camera can realize AV synch.