Features Wall Detection Monitor Audio Spy Surveillance Bug. Small and Compact Design - easy to carry. High Sensitivity and Strong Penetrablity. 3.5mm Earphone Jack. Built-in Rechargeable 3.7V lithium Battery. Specifications Primary Function - Wall Detection Listening Device. ON/OFF switch button with volume dial. 3.5 mm. earphone jack. Listening Device - earphones. Power Source - 3.7V lithium battery. Penetrability - cement wall, steel wall, wooden wall, iron wall, glass and air brick. Materials - metal case with built-in sound amplifier. Dimensions - 43 x 36 mm. - SKU: ANK22596

Features Wall Detection Monitor Audio Spy Surveillance Bug. Small and Compact Design - easy to carry. High Sensitivity and Strong Penetrablity. 3.5mm Earphone Jack. Built-in Rechargeable 3.7V lithium Battery. Specifications Primary Function - Wall Detection Listening Device. ON/OFF switch button with volume dial. 3.5 mm. earphone jack. Listening Device - earphones. Power Source - 3.7V lithium battery. Penetrability - cement wall, steel wall, wooden wall,