The newly designed Lockmasters' Amp Master offers improved volume control at the amp and the microphone "pick-up". This dual volume control allows the user to fully control the focus of the microphone & the amp, thus eliminating background noise. The amp volume control (0 - 11) allows for a full range of output to the headphones.

The Lock Amp provides earbuds; however, users are encouraged to use their own noise cancelling headphones with the 3.5 mm jack.

• Microphone - High quality, well-made microphone that offers natural, balanced and accurate sensing of the vibrations. You are in control of your sound level at all times.
• Additional levels of electronic RF filtration. Allows the locksmith to “hone-in” on the various tones of a mechanical lock, while filtering unwanted ambient noise.
• Amp - Volume control knob ranges from 0 - 11 for a full range of output.
• Easily accessible 9V Battery.