The Wilson 814021 is a 5 watt direct connect Iden amplifier. It can only be used for one phone.The advantage of a direct connect amplifier over a wireless is that it has a stronger gain than a wireless amplifier. It is also cheaper than the regular wireless amplifier. Another advantage it has is that it can be used with a glass mount antenna thereby you don't have to make holes in your vehicle like the NMO needs or have wires coming in through your window like the magnet mounts. It is recommended to be used for stationary items. For example atm machines, computers, and cars.

Features:

• Maximum 5 watts output power on iDEN frequencies
• For use with Nextel, Southern Linc, Mike, and private iDEN systems
• Smart Technology ™ amplifies only on data stream to keep power consumption low
• Mobile, marine and in-building use
• Improves performance of phone-cradle systems
• External antenna and cell phone or cellular data card adapter is required (sold separately)
• FCC and IC type accepted