This Spy Net Super Hearing Device Bionic Ear is the ultimate infiltration tool and comes packed with high tech features. Listen through doors, walls and windows!Spy Net Bionic EarSuper hearing deviceListen through walls, windows and doorsIncludes sensor unit, base unit and ear budRequires 3 AAA batteriesRecommended for ages 8 and upBrand is Real TechIncludes audio earphone. Listen through doors, walls and windows !Get the scoop with real ultrasound technology!Works through glass, sheetrock and wood!Visit SpyNetHQ.com to learn more.Great gift!FREE! Sellers: Add a FREE map to your listings. FREE!