A. Advantages: - Wired piezoelectric microphones can save time, are relatively easy to install, and convenient to use. - You may install the piezoelectric element inside or outside your [device]. Drill a hole and install it. Drill from the inside of the main body, loosen the pin nut, insert it into the hole and tighten the nut. - It is relatively easy to install, has good sound effects through several different amplifiers, does not require soldering, and does not need a battery. - It has the advantage of reducing external interfering sounds and is less affected by the sound reflection of nearby objects. B. Specifications: - Type: 1 to 2 - Pick - up diameter: 30 mm/1.2 inches - Color: Black - Plug hole diameter: 6 mm/0.24 inches - Plug thread diameter: 12 mm/0.47 inches - Cable length: 55 cm - Material: Plastic + Metal - Cable tie size: 115×2 mm/4.4 inches×0.08 inches (length×width) - Tie mounting base size: 28×28×6 mm/1.1 inches×1.1×0.24 inches (length×width×thickness) C. Package contents: - 1 pick - up - 1 rubber block - 1 cable tie D. Notes: - Only the above - mentioned package contents are included, and no other products are included. - Note that light and different displays may cause slight differences between the color of the items in the picture and the actual objects. The allowable measurement error is ±1 - 3 cm.