I have had blue parrots for a long time. Only ones I would recommend. They all are fabulous for talking in loud or quiet conditions. People think I'm talking on a land line even in loud conditions. I don't even like talking without it anymore. I've had a 250, 350 and currently have the 450. All 3 work the same as far as call quality. The 350 and 450 have longer lasting batteries. The 450 however takes the cake with distance from phone. Depending on line of sight/ blockages I can easily walk 100 feet away from my phone with the 450. It's amazing. The other 2 you are lucky to go 20 feet. For that reason alone I recommend the 450. Otherwise I'd go with the 250 if distance from phone doesn't matter
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