We have the Cobra Microtalk 3's, with the vibrating feature and fold-down antenna, which is "Way Cool" according to my 13-year-old nephew. We purchased them at Sports Authority 14 months ago, and purchased the rechargeable battery packs and charger at
Best Buy 2 months later. In June, we purchased a pair of Cobra 2's for 2 reasons: since becoming DVC members we take relatives and friends with us most trips, and needed 3 sometimes, and we want our kids to use the less-expensive 2's at a local theme park(Carowinds). Both the Cobra 2's and 3's have sub-channels, but only the 3's vibrate and have a fold-down antenna, making them smaller. The 2's have a handy belt-clip that DH likes, though. The reception on both is fantastic at WDW, but there is one little glitch I don't understand(maybe someone here knows)...the 2's can call the 3's(but can't make them vibrate)but the 3's can not call the 2's(the radio screen shows a signal, but there is no sound emitting from the radio). We can communicate(talk) just fine between all 4 radios, but the 3's just won't "ring" the 2's to let them know there is an in-coming call. I have e-mailed Cobra and called, but received no response. I tried exchanging the 2's at Best Buy, but they did not have anymore of the 2's packaged together, and they were going to penalize me a percentage(20%, I think) "open box" charge, so we decided to keep them. I really like the 3's better, but for the difference in cost, I would go with a pair of 2's in a heartbeat. The 2's were about $10 more for the PAIR than the 3's were PER RADIO. The rechargeable battery packs work in both, but I would not purchase the ear buds(we are sorry we did, as they were only used once). I hope this helps.