Precision Contact Sound Amplification Tool

Black plastic unit with no stated size or mass (±1–3 cm dimensional tolerance applies). Powered by an internal 180mAh lithium battery, recharged via the bundled USB cable. Includes only the device and one USB cable — no extras. Engineered for accurate, real-time amplification of contact-transmitted sound — excelling on timber framing, internal doors, sheet metal, tiled floors, and metallic pipelines. Audio is delivered exclusively through its built-in headphones, ensuring private, clear listening. Volume is adjustable in small steps to maintain auditory comfort and detail resolution. Supports non-destructive evaluation workflows: locating missing insulation gaps, confirming HVAC duct airflow, assessing door lock engagement, or introducing students to mechanical wave behaviour in everyday structures.