This latest hidden antenna handheld design 16-band all-in-one frequency can block all mobile phone signals, LOJACK GPS, Wi-Fi, RF signals. 12 watts power , interference range 2 to 20 meters (at 75dBm, depending on (Signal strength in a given area). Two sets of antennas of different lengths are used to hide or have better interference effect. LCD display of battery power (capacity percentage, working voltage / current ABS shell, good cooling system, internal cooling fan, The heat sink is larger, and the temperature is lower than 50 ℃.). Using the DIP switch, you can open / close any signal frequency band without affecting other frequency bands.With car charger 12V DC / AC power is also available. Built-in larger battery, can work for more than (2.0+ hours) 120 minutes, easily recharge.