Please correct

English as a Second Language English Vocabulary, Grammar and Idioms
1
  1. With audio-frequency receiver such as Bicotest, we can easily hear the sound at the fault location.
  2. With audio-frequency receiver such Bicotest, we can easily hear the sound at the fault location.
    Please correct the above.
    Thanks.
2

With an audio-frequency receiver such as Bicotest, we can easily hear the sound at the fault location.