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Message: [QUOTE="TwinSpar, post: 1214131, member: 16314"] As a general rule of thumb, 2-ways will get you about a mile for every watt of power that they transmit at. That's a general estimate that is probably more real world than what you will see some advertising proclaiming. Many of the distances that they advertise are in optimal conditions (i.e. flat ground/lake or mountain down into a valley). I've used 2-ways between vehicles (2 watt units) that were usually good to about 2 miles. You have to keep in mind that there was no external antenna so the radio was transmitting from within a vehicle interior. Different vehicles will have different levels of antenna performance than others. I had a BMW and a Toyota truck, and was moving from KS to MD. I had to get an external antenna for the BMW to even use the radio outside of a 1/2 mile separation. I think it must have been shielded in lead. LOL [/QUOTE]