Specification:
Item type: push-through microphone
Material: plastic, electronic components.
Product size: approx. 61 x 3.5 mm / 2.4 x 0.1 inches.
Power Consumption: 10mA
Battery: 200 mAh lithium battery (included).
Operating temperature: -20℃-50℃.
Applicable: cement wall, steel wall, wooden wall, iron wall, glass wall, hollow brick, etc. and various piping materials and floors, walls, etc.
Monitoring method: headphones, external speakers can be connected

Use:
Use after charging

Packing list:
1 x push-through microphone.
1 x headphones.
1 x data cable.

Note:
1. Manual measurement, please allow some errors.2. This detector is a simple home version and its sensitivity cannot be compared to more expensive products. It can only be tested briefly and should be purchased with caution for more demanding requirements.