The Wilson Electronics 304203 tri band mobile cellular NMO mount antenna will minimize loss and maximize gain in the iDEN (806 - 866/896-939 MHz) and PCS (1850 - 1990 MHz) bands. A gain of 3 dB can be expected in iDEN band and a gain of 4 dB in the PCS band with this whip antenna. The Wilson roof mount antenna requires a Motorola-style, NMO mount. Requires Antenna Adapter Cable if connecting directly to a phone.