The telephone is still the most serious threat to your privacy. The line can be tapped or "bugged" and the telephone itself can be easily converted into a very effecient room monitor. This "Tap Trap" checks the line for on-premises series and parallel bugs and wiretaps. Also checks the telephone for common types of hookswitch bypasses. The Tap Trap detects series devices with a resistance of 61 ohms or more. It detects parallel devices with a resistance of 33 megohms or less. Supplied with plugs, cords adapters and instruction book. No sales to individuals - corporate customers only! VG640 - 1 in stock