The Keychain Camera Detector. Spy vs Spy in action. They build small peephole cameras, you carry around a teeny keychain detector which lets you locate them. They slink off in disgust. You order room service. 3 meter range. Priced at around $50.00.

• Wild-range: include 900, 1200, 1300MHz and 2.4GHz
• Receiving sensertivity: 500MHz ~ 3GHz
• Coverage range: 3 meter a radius
• Signal O/P: red light LED flash
• Battery: 3V. LR-44 x 2pcs