Specifications: 1) Frequency range: 260.00-262.54MHz / 390.00-392.54MHz 2) Super long communication distance: more than 168km in open area 3) PLL technology, 128 channels, and point to point communication 4) Both base and sub-base with transmitting booster and receiving booster 5) Supports 5 extensions (sub-bases or handsets), sub-base with LCD and keypad 6) Attractive appearance 7) Practical 8) Base-to-base UHF super long distance cordless telephone